It's about 85 times as big as Detroit.
In other words, 31,000,000 dunams is 86.230 times the size of Detroit, and the size of Detroit is 0.0116 times that amount.(Michigan)
The largest city in Michigan as of 2009, Detroit measures 359,500 dunams in total area. The city is known for its automotive industry and its popular music legacies in the soul, hip hop, pop, and rhythm & blues genres
It's about 90 times as big as Philadelphia.
In other words, 31,000,000 dunams is 88.60 times the size of Philadelphia, and the size of Philadelphia is 0.01129 times that amount.(a.k.a. Philly, a.k.a. The City of Brotherly Love) (Pennsylvania)
The largest city in Pennsylvania as of 2009 and at one time the second-largest city in the British Empire, Philadelphia measures 349,900 dunams in total area. The city is known as a center of great historical importance and as the one-time capital of the United States.
It's about 90 times as big as The US Virgin Islands.
In other words, 31,000,000 dunams is 89.60 times the size of The US Virgin Islands, and the size of The US Virgin Islands is 0.0112 times that amount.(a.k.a. United States Virgin Islands, a.k.a. Virgin Islands of the United States) (United States) (total land area)
The US Virgin Islands are an insular area of the United States consisting of the Caribbean islands of Saint Croix, Saint John, Saint Thomas, Water Island, and others, which measure 346,000 dunams in total land area. The islands are known as popular tourist destinations and as the location of several petroleum refineries.
It's about 100 times as big as Honolulu.
In other words, 31,000,000 dunams is 117.1340 times the size of Honolulu, and the size of Honolulu is 0.00853723 times that amount.(Hawaii)
The capital and most-populated city in Hawaii, Honolulu measures 264,655 dunams in total area. The city is known as the home of numerous tourist attractions, including the 'Iolani Palace — the only palace to have been occupied by a monarch in the United States — and the USS Arizona Memorial, which commemorates the victims of the attack on Pearl Harbor in December, 1941.
It's about 150 times as big as American Samoa.
In other words, 31,000,000 dunams is 156 times the size of American Samoa, and the size of American Samoa is 0.00641 times that amount.(a.k.a. Amerika Sāmoa, a.k.a. Sāmoa Amelika) (United States)
American Samoa, a territory of the United States near the nation of Samoa in the South Pacific, measures 199,000 dunams in total area. It is known as the home of two major tuna canneries — StarKist and Samoa Packing.
It's about 150 times as big as Carlsbad Caverns National Park.
In other words, 31,000,000 dunams is 163.80 times the size of Carlsbad Caverns National Park, and the size of Carlsbad Caverns National Park is 0.006105 times that amount.(a.k.a. Carlsbad Caverns National Park) (Eddy County, New Mexico)
The home of the Carlsbad Caverns cave system, the national park of the same name occupies 189,260 dunams. James Larkin White, a 19th-century cowboy, explorer, and eventual park ranger discovered the cave and named many of its caverns when he was just sixteen years old.
It's about 200 times as big as Washington, D.C..
In other words, 31,000,000 dunams is 175 times the size of Washington, D.C., and the size of Washington, D.C. is 0.00571 times that amount.(formally the District of Columbia, a.k.a. Washington, a.k.a. the District, a.k.a. DC) (United State)
The United States' capital and only federal district, Washington, D.C. is a 177,000 dunams area located between the states of Virginia and Maryland. Washington, D.C. is known as the center of each of the three branches of the United States federal government and as home to many of the nation's monuments, museums, and foreign embassies.