It's about nine times as big as Rock Island.
In other words, 349,900 dunams is 8.92080 times the size of Rock Island, and the size of Rock Island is 0.11210 times that amount.(a.k.a. Arsenal Island, a.k.a. Rock Island Arsenal) (Illinois, on the Iowa border) (land area only)
Rock Island measures 39,220 dunams in total area. It is known as the largest government-owned weapons manufacturing arsenal in the United States and the US Army's only active foundry, as well as a former Union prison camp during the American Civil War.
It's about one-tenth as big as Big Bend National Park.
In other words, 349,900 dunams is 0.1079210 times the size of Big Bend National Park, and the size of Big Bend National Park is 9.266040 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 one-tenth as big as Rhode Island.
In other words, 349,900 dunams is 0.0874387 times the size of Rhode Island, and the size of Rhode Island is 11.43660 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-fifteenth as big as Fort Bliss.
In other words, the size of Fort Bliss is 13 times 349,900 dunams.(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 thirteen times as big as Tuvalu.
In other words, the size of Tuvalu is 0.077 times 349,900 dunams.(a.k.a. Ellice Islands)
Tuvalu is a chain of islands totaling 26,000 dunams in area and located midway between Hawaii and Australia, near Samoa and Fiji. It is the third-least populated nation in the world, with just 11,992 citizens and residents.
It's about one-fifteenth as big as Grand Canyon National Park.
In other words, 349,900 dunams is 0.0709651254 times the size of Grand Canyon National Park, and the size of Grand Canyon National Park is 14.0914286 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-fifteenth as big as Anchorage.
In other words, 349,900 dunams is 0.06887357 times the size of Anchorage, and the size of Anchorage is 14.519360 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.