It's about 3,500 times as big as The United States Capitol.
In other words, the size of The United States Capitol is 0.00027 times 83,990 hectares.(Washington, DC) (Immediate grounds size)
The grounds of United States Capitol, at the center of Washington DC's quadrants, consists of about seventeen buildings on a 23 hectares plot. While the Capitol Building is the central feature, other buildings include the Supreme Court Buildings and the Library of Congress Buildings, as well as several monuments and sculptures.
It's about 4,000 times as big as Grand Central Station.
In other words, the size of Grand Central Station is 0.0003 times 83,990 hectares.(formally Grand Central Terminal, a.k.a. Grand Central, a.k.a. GCT) (New York City, New York) (total terminal area). Grand Central station, the largest train station in the world by platform count, measures 20 hectares in total area. The large flag which was suspended from the concourse ceiling following the September 11th 2001 terrorist attacks measures about 0.007 hectares.
It's about 6,000 times as big as The Pentagon.
In other words, 83,990 hectares is 6,090 times the size of The Pentagon, and the size of The Pentagon is 0.000164 times that amount.(a.k.a. United States Department of Defense Headquarters) (Washington, D.C.) (total floor area)
The Pentagon, the world's largest office building, contains a total floor area of 13.80 hectares. Built during World War II, the designers compensated for the steel rations then in effect by using 310,000 cu. m of concrete in the construction efforts.
It's about 7,500 times as big as Ellis Island.
In other words, 83,990 hectares is 7,570 times the size of Ellis Island, and the size of Ellis Island is 0.000132 times that amount.(Jersey City, New Jersey and New York City, New York)(now officially part of the Statue of Liberty National Monument)
Ellis Island, home of the Ellis Island Immigration Station, is 11.10 hectares in total area. Nine-tenths of the island were artificially created after the New York-New Jersey borders had already been defined, leading to a sovereignty dispute which was settled by the US Supreme Court in 1998.
It's about 9,500 times as big as Alcatraz.
In other words, the size of Alcatraz is 0.00011 times 83,990 hectares.(a.k.a. The Rock) (California)
Alcatraz Island measures 8.90 hectares. It is known a part of the Golden Gate National Recreation Area, and has historically served as a lighthouse, fort, military prison, and — most famously — a federal prison.
It's about one-ten-thousandth as big as Brazil.
In other words, 83,990 hectares is 0.000098639120 times the size of Brazil, and the size of Brazil is 10,137.970 times that amount.(a.k.a. Brasil, formally the Federative Republic of Brazil, a.k.a. Rep&blica Federativa do Brasil)
Brazil measures 851,487,700 hectares in total area. Brazil is the world's fifth-largest country by area and eighth-largest economy (by GDP).
It's about 10,000 times as big as Buckingham Palace.
In other words, 83,990 hectares is 11,000 times the size of Buckingham Palace, and the size of Buckingham Palace is 0.0000910 times that amount.(a.k.a. Buckingham House) (Westminster, London, England)
Buckingham Palace, the official residence of the British monarch, contains about 7.70 hectares of total floor space. The palace was first inhabited by Queen Victoria in 1831, although after the death of her husband in 1861, the Queen endeavored to spend as little time there as public opinion would allow.