Category
page 1Artificial caves
Longyou Caves
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
Hellnahellir
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