Downtown Atlanta refers to the largest financial district for the city of Atlanta.
As defined by the Central Atlanta Progress (CAP) organization, the area measures approximately 4 mi², and was home to 23,300 as of 2006. This area is bound by North Avenue to the north, Boulevard to the east, I-20 to the south, and Northside Drive to the west. As well as including areas like central Five Points and Fairlie-Poplar, the area also includes outlying inner-city neighborhoods such as SoNo, and Castleberry Hill.
The Atlanta Downtown Improvement District (ADID) organization, though, defines a much smaller downtown area measuring just 1.2 mi². This area is roughly bound by North Avenue to the north, Piedmont Avenue and then I-75 to the east, Martin Luther King Junior Dr, Courtland Street, and Edgewood Avenue to the south, and the railroad tracks to the west. This area only includes the core central business district neighborhoods of Fairlie-Poplar, Five Points, Centennial Hills, and as of May 2007, the Railroad District.

Overview
The area of downtown contains among the tallest buildings in Atlanta. The tallest building in Atlanta, the Bank of America Plaza building, is situated between Midtown Atlanta and Downtown Atlanta. Bank of America Plaza is also the tallest building in any of the U.S. state capitals, and the tallest building in the U.S. outside of New York City and Chicago.
Downtown Atlanta is the heart of the city. This area contains striking architecture dating as far back as the 1800s. Some of the most famous buildings there include:
Downtown Atlanta contains over 22 million square feet of office space; together with Midtown as the central business district they make up over 38 million.

Westin Peachtree Plaza
Georgia-Pacific Tower
Marriott Marquis
Flatiron Building
SunTrust Plaza
191 Peachtree Tower
Bank of America Plaza Buildings
The most important business facilities in Atlanta are located around this area. Among the sports venues, Philips Arena and the Georgia Dome are located around Centennial Olympic Park with Turner Field located a within a mile just south of the downtown area. When the Summer Olympic Games came to the city in 1996, Centennial Olympic Park was constructed. Today, it has been rebuilt to be a 21 acre public park in Downtown Atlanta. Woodruff Park is another public park located nearby.
Many other attractions were established around the area of Downtown. Before the park was built, a popular place in the city was Underground Atlanta. This section of the city acts as a shopping and entertainment district for Atlanta citizens. The Georgia Aquarium is a newly built aquarium complex, being the largest in the world. Not far away, the new, expanded version of the World of Coca-Cola opened in May 2007. The CNN Center is also located in this general locality.
The Georgia State Capitol and the Atlanta City Hall are among the government buildings in downtown, along with other local and federal facilities . The state of Georgia operates the Georgia World Congress Center, which provides the general services of a convention center for the city.