Answer:

cavern

Answer	Crossword Clue
CAVERN	Echo chamber?
CAVERN	Spelunking spot
CAVERN	Carlsbad feature

CAVERN	Spelunking area
CAVERN	Underground room
CAVERN	Spot for spelunkers
CAVERN	Grotto
CAVERN	Spelunker hangout
CAVERN	Subterranean spot
CAVERN	Spelunker's spot
CAVERN	Underground chamber

CAVERN	Place where stalagmites.
CAVERN	Where to find a stalagmite.
CAVERN	Underground chamber.
CAVERN	Relative of a grotto.
CAVERN	Where to find stalactites.
CAVERN	Large dark recess.
CAVERN	Grotto's relative.
CAVERN	Subterrane.

CAVERN	Grotto.
CAVERN	Troglodyte's pad
CAVERN	Carlsbad sight
CAVERN	Luray feature
CAVERN	Carlsbad attraction
CAVERN	Stalagmites site
CAVERN	Underground hollow
CAVERN	Place for a stalagmite

CAVERN	Stalactite locale
CAVERN	Place to go with a flashlight
CAVERN	Stalactite site
CAVERN	Site of some paintings
CAVERN	Where to find stalactites and stalagmites
CAVERN	Location containing 10-Downs and 25-Downs
CAVERN	Setting for some prehistoric drawings
CAVERN	Spelunking site

CAVERN	Setting for a Pirates of the Caribbean ride