spelunking
Related Words
cavingcavecaverngrottostalactitestalagmitecolumnspeleologykarstlimestonedolomitebedrocksinkholeshafttunnelpassagechamberlabyrinthundergroundsubterraneandarknesstorchflashlighthelmetcarabinerropeharnessascenderdescenderpitonanchorexplorationadventureexpeditionmappingsurveyinggeologymineralogyhydrologyaquiferwater tabledripstonecalcificationerosionsedimentbrecciatravertinetroglodytebatguanohumiditydampnessclaustrophobiacrawlsqueezerappellingabseilingclimbinghikingnaturewildernessgeomorphologystratigraphyvoidhollowabyss