It's about as big as Rhode Island.
It's about nine-tenths as big as Fort Bliss.
In other words, 4,001,660 dunams is 0.8830 times the size of Fort Bliss, and the size of Fort Bliss is 1.130 times that amount.(near Las Cruces, New Mexico and El Paso, Texas)
Fort Bliss is the United States Army's second-largest installation with a total area of 4,530,000 dunams. It is known as the largest TRADOC (Training and Doctrine Command) site, the Army's largest maneuver area, and the country's largest contiguous tract of open airspace.
It's about four-fifths as big as Grand Canyon National Park.
In other words, 4,001,660 dunams is 0.8115984670 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 1.232136380 times that amount.(Coconino County and Mohave Counties, Arizona, near Fredonia and Grand Canyon, Arizona)
Containing the 446 km (277 mi) Grand Canyon gorge, Grand Canyon National Park covers 4,930,590 dunams.
It's about one-and-one-fourth times as big as Big Bend National Park.
In other words, 4,001,660 dunams is 1.234250 times the size of Big Bend National Park, and the size of Big Bend National Park is 0.8102090 times that amount.(Brewster County, Texas, near Alpine, Texas)
Located on the Rio Grande (a.k.a. Rio Bravo) which forms part of the boundary between the United States and Mexico, Big Bend National Park occupies 3,242,190 dunams. With less than half a million visitors per year, Big Bend is one of the continental United States' least trafficked parks.
It's about four-fifths as big as Anchorage.
In other words, 4,001,660 dunams is 0.78767830 times the size of Anchorage, and the size of Anchorage is 1.2695540 times that amount.(formally the Municipality of Anchorage, a.k.a. MOA) (Alaska)
The fourth-largest city in Alaska and in the country, Anchorage measures 5,080,323 dunams in total area. The city is the home of a large energy industry, a hub for air and overseas cargo traffic, and home to nearly half of Alaska's population.
It's about one-and-one-third times as big as Yosemite National Park.
In other words, 4,001,660 dunams is 1.322050 times the size of Yosemite National Park, and the size of Yosemite National Park is 0.7564010 times that amount.(Tuolumne, Mariposa, and Madera counties, California, near Mariposa, California) (total land area)
Famous for its granite cliffs and Giant Sequoia groves, Yosemite National Park is 3,026,870 dunams in total area, of which 208,000 dunams is the well-known Yosemite Valley. The Park is known as the home of Yosemite Falls — the highest waterfall in North America and sixth highest in the world at 739 m (2,420 ft)
It's about seven-tenths as big as Prince Edward Island.
In other words, 4,001,660 dunams is 0.7040330 times the size of Prince Edward Island, and the size of Prince Edward Island is 1.420390 times that amount.(a.k.a. PEI, a.k.a. P.E.I., a.k.a. Île-du-Prince-Édouard, a.k.a. Eilean a' Phrionnsa, a.k.a. Garden of the Gulf, a.k.a. Birthplace of the Confederation, a.k.a. Île Saint-Jean)
Prince Edward Island, located off Canada's eastern coast in the Gulf of St. Lawrence, measures 5,683,910 dunams in total area. Significant among Prince Edward Island's industries is agriculture, with the island producing 1.3 billion kg (1.4 million tons) of potatoes each year — almost 21% the output of the US state of Idaho with 3% as much land.