caverns Definition

cavern out, caves, lairs, ossiferous, stalactites, cavelike, passageways, stalagmites, cenote, crypts, fumaroles, tunnels, dungeon, abysses, grottos, volcanic crater, lagoons, cellars, catacombs, burrows, creatures, crevasses, labyrinths, waterfalls, massifs, rills, carlsbad caverns, crevices, moulins, limestone, orbs, underground, landforms, vats, palisades, kiva, promontories, ledges, outwash, spelunkers, refugium, quarries, bathysphere, domes, gullies, megaliths, dolerite, seacoasts, swamps, cragged, reservoirs, alcoves, wormholes, cirques, tufa, hollows, ponds, tarns, cathedrals, sandstone, nooks, tartarus, basins, precipices, claystone, lanternfish, ectoplasm, seabeds, eskers, uxmal, canebrake, lakes, dank, hogback, tidepool, lava, fumarole, dreamscapes, middens, syrtis major, glowworms, crinoids, eldritch, hummocks, slickrock, valleys, chambered nautilus, vortexes, hallstatt, subaquatic, lacework, concretions, tadpole shrimp, depths, cliffs, root cellar, canyon, subbasement, polynya, sepulchers,