It's about twenty times as big as Washington, D.C..
In other words, 3,500,000 dunams is 19.80 times the size of Washington, D.C., and the size of Washington, D.C. is 0.0505 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.
It's about one-twenty-fifth as big as Lake Superior.
In other words, the size of Lake Superior is 23.50 times 3,500,000 dunams.(a.k.a. Lac Supérieur, a.k.a. Gitchigumi, a.k.a. Gitche Gumee) (surface area)
Both the largest of North America's Great Lakes and the largest freshwater lake in the world (by surface area), Lake Superior has a total area of 82,100,000 dunams. It borders the cities of Duluth, Minnesota and Thunder Bay, Ontario, Canada
It's about one-twenty-fifth as big as South Carolina.
In other words, 3,500,000 dunams is 0.04220328 times the size of South Carolina, and the size of South Carolina is 23.694840 times that amount.(United States)
The "Palmetto State," South Carolina measures 82,931,940 dunams in total area. South Carolina's border with Georgia is almost entirely marked by the Savannah River, which stretches for 560 km (350 mi) along South Carolina's southeastern boundary.
It's about one-twenty-fifth as big as Maine.
In other words, 3,500,000 dunams is 0.0381905 times the size of Maine, and the size of Maine is 26.184520 times that amount.(United States)
The "Pine Tree State," Maine measures 91,645,820 dunams in total area. Machias Seal Island, about 80 dunams of Maine's area, continues to be a source of dispute between the United States and Canada, with each country claiming sovereignty over the small, treeless island.
It's about one-twenty-fifth as big as Indiana.
In other words, 3,500,000 dunams is 0.03710713 times the size of Indiana, and the size of Indiana is 26.9490 times that amount.(United States)
The "Hoosier State," Indiana measures 94,321,490 dunams in total area. The state is bisected north-south by the Wabash River, one of the longest rivers in the United States at 661 km (411 mi).
It's about one-thirtieth as big as Kentucky.
In other words, 3,500,000 dunams is 0.03344197 times the size of Kentucky, and the size of Kentucky is 29.902540 times that amount.(formally the Commonwealth of Kentucky) (United States)
The "Bluegrass State," Kentucky measures 104,658,900 dunams in total area. The Kentucky Bend, a 45,470 dunams piece of land, is a non-contiguous enclave to the west of Kentucky proper, surrounded by Missouri and Tennessee, and the only such non-contiguous state area in the United States.
It's about one-thirtieth as big as Tennessee.
In other words, 3,500,000 dunams is 0.03206579 times the size of Tennessee, and the size of Tennessee is 31.185880 times that amount.(United States)
The "Volunteer State," Tennessee measures 109,150,600 dunams in total area. Much of the 27,580,000 dunams of land in the West Tennessee Grand Division (Tennessee being divided into three "Grand Divisions") was ceded to the United States by the Chickasaw Nation in 1818.