secrets of the night. exploring the mysterious cave

adventure allure backpacking bats beauty camping cave cavern cavernous caverns caves caving climbing conservation cool curiosity damp dark depths design drip earth ecotourism education eerie equipment experiences exploration footsteps formations gear gems geologic geology hidden hiking interior intrigue landscape lighting limestone magic mindset minerals mysterious mystery natural night otherworldly places quiet reflection rock scene scenery science secluded secrets shadows silence solitude speleology spelunking sports stalactites stalagmites stillness subterranean techniques tools torch tourism travel underground unexplored unique wanderlust wonder world