Islamabad became Pakistan's capital on October 14, 1967, replacing Karachi. The government commissioned Greek urban planner Constantinos Apostolou Doxiadis to design the city in 1960. Construction began in 1961 on the Pothohar Plateau at the northern edge of Punjab Province. The federal administration completed its relocation from Karachi by 1969. Pakistan chose this northern location to distribute development away from the southern coast and position government closer to the military headquarters in adjacent Rawalpindi, which lies nine kilometers southwest.
Doxiadis organized Islamabad into eight zones and designated sectors using a grid of numbers and letters. The city covers 906 square kilometers total area. Zone I contains administrative buildings. Zone II holds the commercial and business sectors. Zones III through VIII designate residential, industrial, educational, and diplomatic areas. Each sector measures approximately two kilometers by two kilometers. Sectors carry alphanumeric names: F-6, F-7, G-6, and so forth, with letters running west to east and numbers south to north. The lowercase letters a, b, c, and d subdivide each sector into four sub-sectors of roughly 200 hectares each.
The Margalla Hills define Islamabad's northern boundary, rising to 1,604 meters at Tilla Charouni peak. Margalla Hills National Park encompasses 17,386 hectares established in 1980. The hills contain 600 plant species and provide habitat for leopards, porcupines, and 250 bird species. Trail 3, the most frequented hiking route, ascends 3.5 kilometers from sector F-6 to Viewpoint. Trail 5 reaches Pir Sohawa at 1,000 meters elevation after 5.8 kilometers. The Capital Development Authority maintains 27 numbered trails.
Faisal Mosque anchors the northern sectors at the base of the Margalla Hills. King Faisal bin Abdul-Aziz of Saudi Arabia funded the construction. Turkish architect Vedat Dalokay won the design competition in 1969 from 43 entries worldwide. Construction began in 1976 and concluded in 1986. The mosque covers 54,000 square meters with the prayer hall holding 10,000 worshippers and courtyard accommodating 24,000 more. Four 88-meter minarets stand at the courtyard corners. The main prayer hall lacks a dome, departing from traditional mosque architecture. The structure uses white marble throughout. The King Faisal Foundation operates an Islamic university adjacent to the mosque grounds.
The Pakistan Monument stands on the western Shakarparian Hills in sector G-5. Arif Masoud designed the structure, which opened in March 2007. Four large petals represent the four provinces: Punjab, Sindh, Khyber Pakhtunkhwa, and Balochistan. Three smaller petals represent the territories of Gilgit-Baltistan, Azad Jammu and Kashmir, and the Federally Administered Tribal Areas. The petals curve inward to form a dome shape when viewed from above, resembling a blooming flower or the crescent and star of Pakistan's flag. The monument sits on an elevated platform with a museum underneath displaying artifacts from Pakistan's independence movement and subsequent history.
Rawalpindi predates Islamabad by centuries and functioned as the interim capital during Islamabad's construction. The twin cities share infrastructure, with Benazir Bhutto International Airport located in Rawalpindi serving both populations. Rawalpindi's railway station, established during British rule in 1881, connects to Pakistan Railways' main lines. The Grand Trunk Road passes through Rawalpindi linking Peshawar to Lahore. Islamabad Highway and Expressway connect the federal capital to the motorway network. The cities combined held 4.1 million residents in Pakistan's 2017 census.
Islamabad hosts all federal government buildings. The Parliament House complex in sector G-5 contains the National Assembly and Senate chambers. Construction began in 1982 and completed in 1986. The building covers 108,000 square meters. The Secretariat buildings in sector G-5 house federal ministries. The Supreme Court of Pakistan sits in sector G-5 in a building completed in 1964 before the capital's full establishment. The President's House (Aiwan-e-Sadr) occupies 90 hectares in sector E-7.
Quaid-e-Azam University operates on 1,709 acres in sector H-8. The university opened in 1967 as a postgraduate research institution. Pakistan Institute of Engineering and Applied Sciences (PIEAS) in Nilore focuses on nuclear sciences and engineering, established in 1967. National University of Sciences and Technology (NUST) maintains its main campus on Islamabad Expressway, founded in 1991. International Islamic University operates campuses in sectors H-10 and E-7, established in 1980.
Daman-e-Koh viewpoint sits at 730 meters elevation in the Margalla Hills overlooking the city. The site provides a north-facing vista of the entire grid layout. The Capital Development Authority built the viewing area with parking and facilities. Pir Sohawa stands higher at 1,000 meters and offers restaurants and viewpoints accessible by road. The Monal Restaurant operates at this elevation since 2006, built into the hillside.
Lake View Park in sector F-9 covers 167 acres surrounding Rawal Lake. The Capital Development Authority developed the park opening it in phases from 2008 to 2010. The park contains walking tracks, a botanical garden, and an amusement zone. Rawal Lake itself formed in 1960 from damming the Korang River. The reservoir holds 58,000 acre-feet and supplies water to Rawalpindi and parts of Islamabad. The lake sits at the junction of the Margalla and Murree hills.
The Saidpur Village in sector E-7 preserves a settlement dating to the Mughal period. Archaeological evidence indicates habitation during Emperor Jahangir's reign (1605-1627). The village contained Hindu and Sikh populations before partition in 1947. The Capital Development Authority began restoration in 2006, converting historic structures into museums and restaurants while maintaining architectural authenticity. The village includes a Hindu temple and Sikh gurdwara.
Lok Virsa Museum in sector F-6 displays Pakistani folk heritage. The National Institute of Folk and Traditional Heritage established the museum in 1974. The complex includes an open-air museum with replicas of traditional houses from Pakistan's regions. The main building houses 60,000 artifacts including textiles, jewelry, musical instruments, woodwork, and pottery. The Heritage Library maintains 45,000 books and documents related to Pakistan's cultural history.
The Centaurus shopping complex in sector F-8 rises 127 meters across two towers completed in 2013. The complex contains a hotel, offices, apartments, and a shopping mall spanning 400,000 square feet. Giga Mall in sector D-12 opened in 2015 covering 400,000 square feet. The Blue Area in sectors F-6 and F-7 serves as Islamabad's central business district, named for original planning maps showing this zone in blue. Jinnah Super Market in sector F-7 and Super Market in sector F-6 provide retail clusters.
Islamabad receives 1,143 millimeters average annual precipitation. The monsoon season from July through September delivers 60 percent of annual rainfall. January averages minimum temperatures of 2 degrees Celsius and maximum of 17 degrees Celsius. June records maximum temperatures reaching 40 degrees Celsius. The Margalla Hills create a rain shadow effect. Humidity ranges from 46 percent in June to 74 percent in August.
The Diplomatic Enclave in sector G-5 houses 57 foreign embassies and high commissions on dedicated plots. The enclave follows strict security protocols with controlled access points. The United States Embassy compound covers approximately 16 hectares. Embassies occupy purpose-built compounds designed by their respective countries' architects. The Ministry of Foreign Affairs maintains offices adjacent to the enclave.
Rose and Jasmine Garden in sector H-8 spreads across 70 acres opened in 2009. The garden contains 250 varieties of roses and multiple jasmine species. Shakespeare Garden in the same sector cultivates plants mentioned in Shakespeare's works. Japan Park in sector F-9 covers 160 acres gifted by the Japanese government in 1986, featuring cherry trees and traditional Japanese landscaping.