It's about one-and-one-tenth times as big as Big Bend National Park.
In other words, 3,500,000 dunams is 1.07952 times the size of Big Bend National Park, and the size of Big Bend National Park is 0.9263380 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 nine-tenths as big as Rhode Island.
In other words, 3,500,000 dunams is 0.8746370 times the size of Rhode Island, and the size of Rhode Island is 1.143330 times that amount.(a.k.a. The State of Rhode Island and Providence Plantations, a.k.a. RI) (United States)
The "Ocean State," Rhode Island measures 4,001,660 dunams in total area. Several large bays totaling 2,706,000 dunams make up 32.4% of its total area.
It's about one-and-one-fifth times as big as Yosemite National Park.
In other words, 3,500,000 dunams is 1.156310 times the size of Yosemite National Park, and the size of Yosemite National Park is 0.864820 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 three-fourths as big as Fort Bliss.
In other words, 3,500,000 dunams is 0.7730 times the size of Fort Bliss, and the size of Fort Bliss is 1.290 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 one-and-three-tenths times as big as Fort Irwin.
In other words, the size of Fort Irwin is 0.770 times 3,500,000 dunams.(San Bernardino County, California)
Fort Irwin measures 2,600,000 dunams in total area. It is known as part of the Installation Management Command and as the home of the Army's National Training Center.
It's about seven-tenths as big as Grand Canyon National Park.
In other words, 3,500,000 dunams is 0.7098540690 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 1.408740250 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 seven-tenths as big as Anchorage.
In other words, 3,500,000 dunams is 0.68893260 times the size of Anchorage, and the size of Anchorage is 1.4515210 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.