cavern
dark, gloomy environment rocky walls and ceilings pools of water stalactites and stalagmites bat colonies dimly lit passages underground river fossils and fossils deposits
cavern which has dark, gloomy environment cavern which has rocky walls and ceilings cavern which has pools of water cavern which has stalactites and stalagmites cavern which has bat colonies cavern which has dimly lit passages cavern which has underground river cavern which has fossils and fossils deposits