cave-monastery, catacomb, crypt, sepulchre

abbey adytum ancient arch architecture art catacomb catacombs cave cavemonastery cavern church city cloister convent crypt dungeon earth entrance grotto high history hollowout house landmark limestone located manmade misery monastery monkery monks monsters mortal mountain murder nunnery passage physiology place refuge religious rock sanctuary scary sepulchre settlement stone subterranean tabernacle temple tomb top tourism tourist