As of 2026-10-16, Takht-e Soleyman tops the list with 74,380,000 m2.
- #1 Takht-e Soleyman — 74,380,000 m2
archaeological site in Takab County, Iranian national heritage site
source Wikidata - #2 Qal'eh Dokhtar — 46,940,000 m2
castle in Firuzabad County, Iranian national heritage site
source Wikidata - #3 Neuschwanstein Castle — 21,140,000 m2
castle in Bavaria, Germany, Europe
source Wikidata - #4 Alnwick Castle — 15,122,400 m2
castle and stately home in Alnwick, Northumberland, England, UK; seat of the Duke of Northumberland, England, UK
source Wikidata - #5 Castle of Racconigi — 14,643,500 m2
Castle in Racconigi, Cuneo, Italy
source Wikidata - #6 Hara Castle — 11,843,900 m2
castle in Hizen Province, Japan
source Wikidata - #7 Namhansanseong — 8,537,100 m2
fortress in Korea
source Wikidata - #8 Hagi Castle — 7,123,100 m2
Japanese castle in Hagi, Yamaguchi prefecture
source 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
source Wikidata