Hanoi sits on the Red River Delta in northern Vietnam at coordinates approximately 21.0285° N, 105.8542° E. The city covers 3,359 square kilometers and contains a metropolitan population of 8.4 million as of 2023. The Red River flows through the eastern districts, historically flooding the plains until the French colonial administration constructed the first systematic dyke system between 1902 and 1924. The river reaches its highest levels between July and September when monsoon rains in Yunnan Province, China increase flow volume to an average 23,000 cubic meters per second.
The city divides into twelve urban districts and seventeen rural districts. The four central districts of Hoàn Kiếm, Ba Đình, Đống Đa, and Hai Bà Trưng contain most administrative functions and colonial architecture. Hoàn Kiếm District surrounds Hoàn Kiếm Lake, which measures 12 hectares with an average depth of 1.5 meters. The lake contains Ngọc Sơn Temple, accessible via the red-painted Thê Húc Bridge constructed in 1885. The temple honors Trần Hưng Đạo, the 13th-century general who defeated Mongol invasions in 1285 and 1288. A preserved specimen of Rafetus swinhoei, a Yangtze giant softshell turtle, was kept in the lake until its death in 2016 at an estimated age exceeding 100 years. One living specimen may remain in the lake, though sightings became rare after 2016.
The Old Quarter occupies approximately one square kilometer north of Hoàn Kiếm Lake. The district contains 76 streets, each historically dedicated to a specific craft guild. Hàng Bạc Street housed silver merchants, Hàng Đào sold silk, Hàng Mã specialized in votive papers. These specializations emerged during the Lý Dynasty (1010-1225) when Emperor Lý Thái Tổ moved the capital from Hoa Lư to Đại La, renaming it Thăng Long meaning "ascending dragon." The street layout follows the original medieval pattern with buildings averaging 3 to 5 meters wide and extending 60 meters deep, a design reflecting tax assessments based on street frontage. The French colonial government paved the main streets between 1888 and 1902. Building heights were legally restricted to five stories until 1986, though enforcement weakened after Đổi Mới economic reforms.
Ba Đình District contains the governmental center. The Ho Chi Minh Mausoleum stands at 21.5 meters tall, constructed between 1973 and 1975 from gray granite quarried in Thanh Hóa Province. The building resembles a lotus flower in profile and sits on Ba Đình Square, where Ho Chi Minh read the Declaration of Independence on September 2, 1945 to approximately 500,000 people. The preserved body requires annual maintenance in Russia for approximately two months, typically between September and December. The mausoleum opens to visitors from 8:00 to 11:00 Tuesday through Thursday and Saturday through Sunday, closing Mondays and Fridays. Photography is prohibited inside. Visitors must dress modestly, covering shoulders and knees, and surrender bags, cameras, and phones before entering.
The Presidential Palace, painted mustard yellow, was built between 1900 and 1906 as the residence for the French Governor-General of Indochina. The building combines French baroque and colonial tropical design across three floors. Ho Chi Minh declined to live in the palace after 1954, instead occupying a traditional stilt house constructed in 1958 within the palace grounds. The house measures 45 square meters, elevated 2 meters on wooden pillars, designed after the traditional homes of the Tày and Nùng ethnic minorities in northern Vietnam. The lower level contained his workspace, the upper level his bedroom and study. Ho Chi Minh lived in this house until his death on September 2, 1969. The house and grounds are accessible as part of the Ho Chi Minh complex, though the stilt house itself can only be viewed from the exterior.
One Pillar Pagoda (Chùa Một Cột) was originally constructed in 1049 under Emperor Lý Thái Tông. The structure sits on a single stone pillar 1.25 meters in diameter, rising from a square pool representing a lotus pond. The wooden temple above measures 3 meters on each side. According to the Đại Việt sử ký toàn thư (Complete Annals of Đại Việt), Emperor Lý Thái Tông ordered construction after dreaming of Avalokiteśvara seated on a lotus flower. French forces destroyed the pagoda in 1954 before withdrawing from Hanoi. Reconstruction occurred in 1955, though the replacement pillar used concrete rather than the original wood. The pagoda remains an active Buddhist temple. Visitors may enter but must remove shoes and dress modestly.
The Temple of Literature (Văn Miếu) was established in 1070 by Emperor Lý Thánh Tông to honor Confucius. The compound covers 54,331 square meters organized around five courtyards. The Imperial Academy (Quốc Tử Giám), Vietnam's first university, was founded here in 1076, initially educating sons of mandarins and royalty. The academy expanded in 1253 to include commoner students who passed regional examinations. Between 1484 and 1780, 82 stone stelae were erected recording the names of 1,307 doctoral graduates. Each stele sits on the back of a stone turtle, symbolizing longevity and wisdom. The turtles measure approximately 1 meter tall and weigh between 1 and 2 tons. Eighty-two stelae survived into the 20th century, though several sustained damage during wars. The site achieved UNESCO recognition as a Documentary Heritage in 2010 and World Heritage inscription in 2011. The temple opens daily from 8:00 to 17:00 with admission at 30,000 Vietnamese đồng for adults.
Trấn Quốc Pagoda stands on a small peninsula in West Lake (Hồ Tây), which covers 500 hectares and represents Hanoi's largest lake. Historical records indicate the pagoda was founded in the sixth century during the reign of Emperor Lý Nam Đế, making it Hanoi's oldest Buddhist temple. The structure relocated to its current position in 1615 during the Lê Dynasty. The central stupa rises 15 meters through 11 tiers, constructed in 1998 replacing an earlier tower. The pagoda grounds contain a Bodhi tree gifted by Indian President Rajendra Prasad in 1959, grown from a cutting of the original Bodhi tree in Bodh Gaya. The temple houses several bronze Buddha statues cast during the 17th and 18th centuries. The pagoda operates as an active Buddhist monastery.
West Lake formed naturally but historical sources disagree on its origin. Some geological surveys suggest it represents an ancient bend of the Red River that became isolated. The lake perimeter measures 17 kilometers. Causeway Thanh Niên, constructed in 1958, divides West Lake from Trúc Bạch Lake, which covers 23 hectares. John McCain was captured after his A-4E Skyhawk was shot down over Trúc Bạch Lake on October 26, 1967 during his 23rd bombing mission. A monument stands at the lakeside marking the capture location. Water quality in both lakes has deteriorated since 1990 due to residential and commercial development. The Hanoi People's Committee initiated cleanup efforts in 2016, though visible algae blooms persist during summer months.
The French Quarter centers on the area between the Opera House and Hoàn Kiếm Lake. The Hanoi Opera House was constructed between 1901 and 1911, designed by French architects François Lagisquet and Harlay in the style of Palais Garnier in Paris. The building measures 87 meters long, 30 meters wide, and rises three stories. The auditorium seats 598 people across three levels. The facade employs Gothic, Renaissance, and colonial elements with cream-colored facades and green shutters. The Opera House served as the meeting hall for the Hanoi People's Committee in 1945 immediately after the August Revolution. Renovation occurred between 1995 and 1997 ahead of the 1997 Francophonie Summit. The venue hosts performances by the Vietnam National Opera and Ballet, Vietnam Symphony Orchestra, and international touring companies. Tickets range from 100,000 to 500,000 đồng depending on seat location and performance.
The Sofitel Legend Metropole Hanoi opened on December 30, 1901 as the Grand Metropole Palace. The original building featured 52 rooms. The French owners expanded the hotel in 1923, adding the Opéra Wing with 104 additional rooms. Graham Greene stayed in room 214 in 1951, 1952, 1953, and 1955 while reporting on the First Indochina War. He drafted portions of "The Quiet American" in this room, which the hotel later renamed the Graham Greene Suite. Jane Fonda, Joan Baez, and other activists stayed at the hotel during the Vietnam War. A bomb shelter beneath the hotel's pool area was rediscovered during 2011 renovations. The shelter dates to the Vietnam War when hotel guests, including Fonda and Baez, used it during air raids. The shelter is now accessible to hotel guests. Charlie Chaplin and his wife Paulette Goddard honeymooned at the hotel in 1936.
Hỏa Lò Prison, known to American prisoners as the "Hanoi Hilton," was built by French colonists in 1896 to hold Vietnamese revolutionaries. The prison originally covered 12,908 square meters with capacity for 450 inmates, though records show populations exceeding 2,000 during anti-colonial resistance periods. The French held Phan Bội Châu here in 1914 and Nguyễn Thái Học before his execution in 1930. The North Vietnamese government used the prison to hold American POWs between 1964 and 1973. Notable prisoners included James Stockdale, Jeremiah Denton, and McCain. The Vietnamese government demolished most of the prison in 1993 to construct Hanoi Towers, a complex combining offices, apartments, and retail. The southern section was preserved as a museum, opening in 1997. The museum displays cells, guillotine, and exhibits documenting both French colonial use and American POW period. The prison opens 8:00 to 17:00 daily with 30,000 đồng admission.
The Imperial Citadel of Thang Long occupies 18 hectares in Ba Đình District. Archaeological excavations beginning in 2002 revealed foundations and artifacts from the Đại La Citadel (7th-9th centuries), the Lý Dynasty (1010-1225), and subsequent periods through the Nguyễn Dynasty. The site achieved UNESCO World Heritage status in 2010. Visible structures include the North Gate (Bắc Môn), built in 1805, the Flag Tower (Cột Cờ), constructed in 1812 and rising 33.4 meters, and the Hậu Lâu (Princess' Palace), built in 1821. The Flag Tower's octagonal base measures 42.5 meters wide. The tower survived French colonial demolition of most citadel structures in 1894 when the French built military barracks on the site. Vietnamese forces used sections of the citadel as military headquarters during the First Indochina War and Vietnam War. The site partially opened to the public in 2010 and fully opened in 2011.
Hanoi's climate is classified as humid subtropical with four distinct seasons. Annual average temperature is 23.6°C. Summer extends from May to September with average temperatures of 28-33°C and humidity exceeding 80 percent. The hottest months are June and July when daytime temperatures regularly reach 38°C. Winter lasts from December to February with average temperatures of 15-20°C. January is coldest, with nighttime temperatures occasionally dropping to 6-8°C. Rainfall averages 1,676 millimeters annually, concentrated between May and October. Typhoons occasionally reach Hanoi from the South China Sea between August and November, though the city sits far enough inland that storm intensity typically decreases before arrival. The city experienced severe flooding on November 1-2, 2008 when the Red River reached 11.56 meters, exceeding the alert level by 2.06 meters.
Public transportation consists primarily of buses and motorcycles. Hanoi operates approximately 100 bus routes managed by the Hanoi Public Transport Management and Operation Center. Standard bus fare is 7,000 đồng, paid upon boarding. Buses operate from approximately 5:00 to 21:00, though specific times vary by route. Air conditioning is not standard on all buses. The city's first metro line, Line 2A, opened on November 6, 2021 after 13 years of construction. The line runs 13 kilometers from Cát Linh to Hà Đông with 12 stations. Chinese contractor China Railway Sixth Group built the line. Trains operate every 10 minutes during peak hours, 15 minutes off-peak. Tickets cost 8,000 to 15,000 đồng depending on distance. Line 3, running from Nhổn to Hanoi Station, remained under construction as of 2024 with multiple delays extending the completion date beyond initial 2015 projections.
Motorcycles and scooters dominate street traffic. The Hanoi Department of Transport reported 6.2 million registered motorcycles in the city as of 2022. Traffic moves continuously through intersections with limited regard for traffic signals, particularly at smaller intersections. Pedestrians cross streets by maintaining steady speed, allowing motorcycles to flow around them. Sudden stops or direction changes increase collision risk. The government banned motorcycle taxis (xe ôm) from Old Quarter streets during peak hours in 2018, though enforcement is inconsistent. Ride-hailing services Grab and Gojek operate throughout the city via smartphone apps. Typical fares within central districts range from 30,000 to 60,000 đồng.
Nội Bài International Airport sits 27 kilometers north of central Hanoi in Sóc Sơn District. The airport opened in 1978 and served 29 million passengers in 2019. Terminal 1 handles domestic flights, Terminal 2 serves international routes. Vietnam Airlines, VietJet Air, and Bamboo Airways operate domestic networks from Nội Bài. The airport connects to 40 international destinations across Asia, Europe, and Australia. Airport bus 86 runs between the airport and Hanoi Railway Station every 40 minutes from 6:30 to 23:00, costing 30,000 đồng with a 45-60 minute journey time. Airport taxis to central Hanoi cost 300,000 to 400,000 đồng using metered operators Mai Linh or Taxi Group. Grab charges 280,000 to 350,000 đồng for the same route depending on demand.
Hanoi Railway Station occupies a location in Hoàn Kiếm District at the intersection of Lê Duẩn and Trần Hưng Đạo Streets. The French colonial administration opened the original station in 1902 as part of the Hanoi-Saigon railway. American bombing destroyed the station in 1972. Reconstruction finished in 1976. Vietnam Railways operates daily Reunification Express trains between Hanoi and Ho Chi Minh City, covering 1,726 kilometers in 29.5 to 33 hours depending on the service. The SE1 and SE3 southbound departures leave at 19:00 and 19:30 respectively. Ticket prices range from 800,000 đồng for hard seat to 2,200,000 đồng for a four-berth soft sleeper compartment. The station also serves routes to Lào Cai (for Sapa access), Hải Phòng, and Chinese border crossings.
Street food defines Hanoi's culinary culture. Phở originated in Nam Định Province south of Hanoi in the early 20th century, becoming associated with Hanoi after vendors relocated to the capital. The dish consists of flat rice noodles in beef or chicken broth. Phở Gia Truyền Bát Đàn opened at 49 Bát Đàn Street in the 1960s and operates from a narrow storefront with small plastic stools. Bowls cost 50,000 đồng. Phở Thìn at 13 Lò Đúc Street serves a variation featuring stir-fried beef. Bún chả, grilled pork served with rice vermicelli and herbs, appears on menus throughout the Old Quarter. Bún Chả Hương Liên at 24 Lê Văn Hưu Street gained attention when President Obama and Anthony Bourdain ate there on May 23, 2016. The restaurant preserved their table behind glass. A bún chả meal costs 40,000 đồng.