It's about one-tenth as big as Glacier Bay National Park.
In other words, 1,230,000 dunams is 0.09255 times the size of Glacier Bay National Park, and the size of Glacier Bay National Park is 10.80 times that amount.(a.k.a. Glacier Bay National Park and Preserve) (Hoonah-Angoon Census area, and Yakutat City and Borough, Alaska)
Containing nine tidewater glaciers, Glacier Bay National Park covers 13,290,000 dunams of which 10,760,000 dunams is designated a Wilderness Area. Glacier Bay is home to the 33.8 km (21 mi) long Margerie Glacier.
It's about eleven-and-a-half times as big as Hilton Head.
In other words, 1,230,000 dunams is 11.29870 times the size of Hilton Head, and the size of Hilton Head is 0.0885058 times that amount.(a.k.a. Hilton Head Island) (South Carolina)
Hilton Head Island measures 108,860 dunams in total land area. The island (and city of the same name) is located in the Atlantic Ocean and is known as popular vacation destination.
It's about one-tenth as big as Connecticut.
In other words, 1,230,000 dunams is 0.0856713 times the size of Connecticut, and the size of Connecticut is 11.67250 times that amount.(United States)
The "Constitution State" or the "Nutmeg State," Connecticut measures 14,357,200 dunams in total area. The northern boundary between Connecticut and Massachusetts is an otherwise straight line marked by the 6,500 dunams "Southwick Jog" — a notch of Massachusetts extending southward into Connecticut near Congamond Lakes.
It's about twelve times as big as Disney World.
In other words, 1,230,000 dunams is 12.20 times the size of Disney World, and the size of Disney World is 0.082 times that amount.(a.k.a. Walk Disney World Resort, a.k.a. Walt Disney World, a.k.a. WDW) (Lake Buena Vista and Bay Lake, Florida) (total site)
Disney World currently occupies 101,000 dunams. Part of the former total area of 120,000 dunams now comprises the Disney planned community of Celebration, Florida.
It's about one-fifteenth as big as Lake Ontario.
In other words, 1,230,000 dunams is 0.06487 times the size of Lake Ontario, and the size of Lake Ontario is 15.420 times that amount.(a.k.a. Lac Ontario) (surface area)
The smallest of North America's Great Lakes (by surface area), Lake Ontario has a total area of 18,960,000 dunams. It borders the cities of Toronto, Ontario, Canada and Rochester, New York.
It's about one-fifteenth as big as Wales.
In other words, 1,230,000 dunams is 0.059329 times the size of Wales, and the size of Wales is 16.8550 times that amount.(a.k.a. Cymru) (total area)
The area of the country of Wales (in the United Kingdom) is 20,732,000 dunams. More than 764,700 dunams, or about 4% of the country's land area, is made up of the fifty-plus islands in the Irish and Celtic Seas off the coast of the Welsh mainland.
It's about one-twentieth as big as New Jersey.
In other words, 1,230,000 dunams is 0.0544535 times the size of New Jersey, and the size of New Jersey is 18.36430 times that amount.(United States)
The "Garden State," New Jersey measures 22,588,100 dunams in total area. The Garden State Parkway — the busiest toll highway in the country — runs the 277 km (172 mi) length of New Jersey's coast.