How big is 390 dunams?

The Palace of Holyroodhouse, the residence of the British Monarch in Scotland, measures about 8.10 dunams, on a total grounds area of about 40 dunams. Each year, the Palace hosts a Garden Party, serving 8,000 guests from a 150-meter-long buffet table.

Seal Island, named for the tens of thousands of Cape Fur Seals that live there, measures about 8.10 dunams. The large number seals attract great white sharks, who circle the island in a so-called "Ring of Death."

Indira Gandhi International Airport covers a total area of about 20,660 dunams, including three main terminals and three main runways. The airport offers a total runway length of 11,053 m.

Housing the presidency, the White House occupies six stories and a total of 6.20 dunams of floor space. This space includes 132 rooms, 35 bathrooms, 28 fireplaces, and 3 elevators, as well as a tennis court, bowling alley, movie theater, jogging track, swimming pool, and putting green.

Per NFL rules, a football field should measure 109.728 m (120 yards) long by 48.768 m wide, for a total area of 5.3512151040 dunams. Due to a blizzard, the first NFL playoff game in 1932 was held indoors in Chicago Stadium (it was also the first indoor game) on a field measuring just 55 m by 40.0 m, for a total area of 2.20 dunams.

The largest of the Aran Islands, Inis Mór measures 31,000 dunams. The west side of the island is home to the Poll na bPéist, a.k.a. the wormhole, a naturally-formed, 0.290 dunams, rectangular pool on the island's cliffside.

One of the largest homes in the world, Bill and Melinda Gates' home has a total area of 4.4740 dunams, including 7 bedrooms, 24 bathrooms, 6 kitchens, 6 fireplaces, a 0.230 dunams gym, a 0.09 dunams dining room, and a 0.190 dunams library. It was designed by Bohlin Cywinski Jackson, the same architectural firm responsible for the design of one of Apple Inc's flagship stores on Fifth Avenue in New York City.

A popular tourist destination, Coron Island, measures about 71,000 dunams in total area. The rocky offshore area of the island makes it popular for shipwreck diving, with some wrecks as shallow as 10 ft. under the water.

Per National Hockey League Official Rules, a hockey rink should measure 60.96 m long by 25.908 m wide with a corner arc radius of 8.5344 m, for a total area of about 1.516828740 dunams. Ice hockey is believed to have developed from field hockey after players began holding games on ice rinks, which had been traditionally used for the sport of curling.

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.

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.

Manchester Cathedral includes a total interior area of 1.2380 dunams between the Nave, Chapel, Library, Chapter House, and Rectory. The height of the Cathedral's bell tower is 41.1 m.

The United States Bullion Depository, commonly referred to by the metonym "Fort Knox" (in spite of the fact that the Depository is not located on the Fort proper), measures 32.0 m (105 ft) by 36.9 m (121 ft), for a total area of about 1.180 dunams. The Depository is most famous for housing the largest portion of the national gold reserve, but has also temporarily housed the original US Declaration of Independence, an original copy of the US Constitution, and other important documents, kept there for safe keeping during World War II.

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.

New Zealand's Abel Tasman National Park measures about 225,300 dunams in total area. The size of the park has increased over the years as donated parcels of land have been added to it, with the last expansion in 2008 adding 7,900 dunams.