As of 2026-04-29, Falak-ol-Aflak tops the list with 5,300,000,000 m2.
- #1 Falak-ol-Aflak — 5,300,000,000 m2
Castle in Khorramabad
Falak ol-Aflak or Shapur Khast Castle is a castle situated on the top of a large hill with the same name within the city of Khorramabad, the regional capital of Lorestan province, Iran. This gigantic structure was built during the Sasanian era (224–651). Read more on Wikipedia.
Wikidata - #2 Kajuru Castle — 1,035,995,244 m2
Castle in Kaduna State, Nigeria
Kajuru Castle is a luxury villa, built between the years 1981 and 1989, at Kajuru (Ajure) village in southern Kaduna State, Nigeria. It was built by a German expatriate in Nigeria, living in Kaduna at the time. Read more on Wikipedia.
Wikidata - #3 Takht-e Soleyman — 74,380,000 m2
archaeological site in West Azarbaijan, Iranian national heritage site
Takht-e Soleymān, is an archaeological site in West Azerbaijan, Iran dating back to the Sasanian Empire. It lies midway between Urmia and Hamadan, very near the present-day town of Takab, and 400 km (250 mi) west of Tehran. Read more on Wikipedia.
Wikidata - #4 Qal'eh Dokhtar — 46,940,000 m2
castle in Firuzabad County, Iranian national heritage site
Qal'eh Dokhtar, Ghale Dokhtar, Dokhtar Castle or Dezh Dokhtar is a castle made by Ardashir I, in present-day Fars, Iran, in 209 AD. It is located on a mountain slope near the Firouzabad-Kavar road. It is important in the field of Sasanian archaeology is one of the eight designated UNESCO World Heritage Sites of the Sassanid Archaeological Landscape of Fars Region. Read more on Wikipedia.
Wikidata - #5 Neuschwanstein Castle — 21,140,000 m2
castle in Bavaria, Germany, Europe
Neuschwanstein Castle is a 19th-century historicist palace on a rugged hill of the foothills of the Alps in the very south of Germany, near the border with Austria. It is located in the Swabia region of Bavaria, in the municipality of Schwangau, above the incorporated village of Hohenschwangau, which is also the location of Hohenschwangau Castle. The closest larger town is Füssen. The castle stands above the narrow gorge of the Pöllat stream, east of the Alpsee and Schwansee lakes, close to... Read more on Wikipedia.
Wikidata - #6 Alnwick Castle — 15,122,400 m2
castle and stately home in Alnwick, Northumberland, England, UK; seat of the Duke of Northumberland, England, UK
Alnwick Castle is a castle and country house in Alnwick in the English county of Northumberland. It is the seat of the 12th Duke of Northumberland, built following the Norman Conquest and renovated and remodelled several times. It is a Grade I listed building now the home of Ralph Percy, 12th Duke of Northumberland and his family. In 2016, the castle received over 600,000 visitors per year when combined with adjacent attraction the Alnwick Garden. Read more on Wikipedia.
Wikidata - #7 Castle of Racconigi — 14,643,500 m2
Castle in Racconigi, Cuneo, Italy
Racconigi Castle is a palace and landscape park in Racconigi, province of Cuneo, Italy. It was the official residence of the Carignano line of the House of Savoy, and is one of the Residences of the Royal House of Savoy included by UNESCO in the World Heritage Sites list. Read more on Wikipedia.
Wikidata - #8 Namhansanseong — 8,537,100 m2
fortress in Korea
Namhansanseong is a historic Korean fortress city in Gwangju, Gyeonggi Province, South Korea. A UNESCO World Heritage Site, the fortress lies atop the mountain Namhansan and stretches 12 km in length. It served as an emergency capital city during the 1392–1910 Joseon period. The design is based on fortress architecture of East Asia, embodying aspects of four historical cultural styles: Joseon of Korea, the Azuchi-Momoyama Period of Japan, and Ming and Qing China. Read more on Wikipedia.
Wikidata - #9 Yinglong Lou — 7,049,520 m2
diaolou in Chikan, Kaiping as part of a World Heritage site in China
source Wikidata - #10 Shanhai Pass — 6,753,200 m2
pass in the Great Wall of China
The Shanhai Pass is a major fortified gateway at the eastern end of the Great Wall of China and one of its most crucial fortifications, as the pass commands the narrowest choke point in the strategic Liaoxi Corridor, an elongated coastal plain between the Yan Mountains foothills and the Bohai Sea, which is the only easily traversable landway between North and Northeast China. It is located in present-day Shanhaiguan District, Qinhuangdao, Hebei province, on the east bank of the Shi River, with... Read more on Wikipedia.
Wikidata