It's about half as big as Vatican City.
In other words, 200 dunams is 0.450 times the size of Vatican City, and the size of Vatican City is 2.20 times that amount.(a.k.a. Holy See, a.k.a. State of the Vatican City, a.k.a. Stato della Città del Vaticano)
The world's smallest nation in both area and population, Vatican City is a walled enclave within Rome, Italy measuring 440 dunams in total area. Vatican City has been home to the Papacy since its incorporation in 1929 and the territory has been the home of Popes since 1377.
It's about two-and-a-half times as big as Buckingham Palace.
In other words, the size of Buckingham Palace is 0.380 times 200 dunams.(a.k.a. Buckingham House) (Westminster, London, England)
Buckingham Palace, the official residence of the British monarch, contains about 77 dunams of total floor space. The palace was first inhabited by Queen Victoria in 1831, although after the death of her husband in 1861, the Queen endeavored to spend as little time there as public opinion would allow.
It's about three-tenths as big as Disneyland.
In other words, 200 dunams is 0.310 times the size of Disneyland, and the size of Disneyland is 3.20 times that amount.(a.k.a. Disneyland Park) (Anaheim, California) (public areas)
The public areas of Disneyland occupy 650 dunams. The park consists of nine themed "stages" — including Main Street, U.S.A; Adventureland; Frontierland; Fantasyland; and Tomorrowland — with hidden passages that allow park employees to move between each without being seen by guests.
It's about one-fourth as big as The Forbidden City.
In other words, 200 dunams is 0.270 times the size of The Forbidden City, and the size of The Forbidden City is 3.70 times that amount.(a.k.a. Forbidden Palace, a.k.a. Purple Forbidden City, a.k.a. Zijin Cheng, a.k.a. Zǐjinchéng, a.k.a. 紫禁城) (Beijing, China)
The imperial palace complex of the Forbidden City consists of 980 buildings covering 740 dunams. The City was the home of Chinese Emperors and their cabinets from its construction in 1420 until the fall of the last ruling dynasty in 1912.
It's about four times as big as Windsor Castle.
In other words, 200 dunams is 3.80 times the size of Windsor Castle, and the size of Windsor Castle is 0.260 times that amount.(Windsor, England) (total site area)
One of the official residences of the British monarch, Windsor Castle measures about 53 dunams. It is the largest inhabited castle in the world and is also the oldest in continuous use, having been occupied since it was built by William the Conqueror about 900 years ago.
It's about four times as big as a Polo field.
In other words, 200 dunams is 3.986633490 times the size of a Polo field, and the size of a Polo field is 0.2508382080 times that amount.(for field polo) (United States Polo Association rules; unboarded side maximum)
An outdoor polo field must measure 274.32 m in length and 146.304 m to in width for a total playing area of up to 50.16764160 dunams. Polo traces its origins to an Iranian (then Persian) war game from the 5th Century, which was played with as many as 100 players per side.
It's about six-and-a-half times as big as The Lincoln Memorial Reflecting Pool.
In other words, 200 dunams is 6.350 times the size of The Lincoln Memorial Reflecting Pool, and the size of The Lincoln Memorial Reflecting Pool is 0.1570 times that amount.(Washington, D.C.) (pool surface area)
The Lincoln Memorial Reflecting Pool has a water surface area of 31.50 dunams. The Pool has a sloping bottom and extends to 80 cm (30 in) in depth at its center.