How big is 0.00 square miles?

One of the official residences of the British monarch, Windsor Castle measures about 0.02 square miles. It is the largest inhabited castle in the world and is also the oldest in continuous use, having been occupied since it was built by William the Conqueror about 900 years ago.

Croke Park, the Gaelic games stadium of Dublin, hosts hurling and Gaelic football matches in a 0.025 square miles stadium. The Park offers rooftop tours, where fans can walk along the 44-meters-high walkway.

Per National Hockey League Official Rules, a hockey rink should measure 60.96 m long by 25.908 m wide with a corner arc radius of 8.5344 m, for a total area of about 0.000585650851 square miles. Ice hockey is believed to have developed from field hockey after players began holding games on ice rinks, which had been traditionally used for the sport of curling.

Buckingham Palace, the official residence of the British monarch, contains about 0.03 square miles 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.

Alcatraz Island measures 0.034 square miles. 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.

Manchester Cathedral includes a total interior area of 0.000478 square miles between the Nave, Chapel, Library, Chapter House, and Rectory. The height of the Cathedral's bell tower is 41.1 m.

The United States Bullion Depository, commonly referred to by the metonym "Fort Knox" (in spite of the fact that the Depository is not located on the Fort proper), measures 32.0 m (105 ft) by 36.9 m (121 ft), for a total area of about 0.000456 square miles. The Depository is most famous for housing the largest portion of the national gold reserve, but has also temporarily housed the original US Declaration of Independence, an original copy of the US Constitution, and other important documents, kept there for safe keeping during World War II.

King Shaka International Airport includes a main passenger terminal, with a total area of 0.0398 square miles. The airport's single, main runway stretches 3,700 m in length.

Ellis Island, home of the Ellis Island Immigration Station, is 0.0429 square miles 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.

The Pentagon, the world's largest office building, contains a total floor area of 0.0533 square miles. 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.

The largest stadium in New Zealand, Eden Park in Auckland measures about 0.0579 square miles over its total grounds. It is primarily a rugby and cricket stadium. The Park offers rooftop tours, where fans can walk along the 39-meters-high roof of the stands.

The Citadelle of Quebec, containing Canada's oldest military buildings measures about 0.0058 square miles in total area. The fortress sits on a 90-meter cliffside, overlooking the St. Lawrence River.

Grand Central station, the largest train station in the world by platform count, measures 0.08 square miles in total area. The large flag which was suspended from the concourse ceiling following the September 11th 2001 terrorist attacks measures about 0.0000300 square miles.

Per NBA rules , a basketball court should measure 29.5656 m long by 16.764 m wide, for a total area of 0.0001913667929 square miles. The first basketball game, held in a Springfield Massachusetts YMCA, was played on a court half the size of today's NBA standard and ended with a score of 1-0.

Sitting atop the 115 m (377 ft) tall Mount Saint Alban at the corner of Massachusetts and Wisconsin Avenues, Washington National Cathedral sits on a landscaped, 0.089 square miles plot.