Category

Artificial caves

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artificial cave system in China

Gwangmyeong Cave

Tourist attraction in Gyeonggi-do, South Korea

Artificial caves of Casal do Pardo

building in Palmela, Setúbal District, Portugal

thumb|right|Hellnahellir Hellnahellir () is the largest man-made or artificial cave in Iceland. It is located in Landsveit, South Iceland. The cave is almost long and the walls are covered with engravings. Its age is unknown but it is most probably from 12th or 13th century.

Artificial caves of Alapraia

cultural heritage monument in Cascais, Portugal

Sangshekanan Cave

former quarry in Jahrom, Iranian national heritage site