magic xueyu stalactites cave fengdu, chongqing, china

adventure ancient art background beautiful beauty blue calcium cave cavern cavity challenge china color colorful courage crystal dark deep drip dripstones drops earth enormous explore formations gather geologic geology hanging interior israel landscape light lighting limestone material minerals miquel moist mountain mystery natural nature old palace park pillars reflection roads rock rocks rocky romanian sant sorek speleologist spelunker stalactite stalactites stalagmite stalagmites stone texture textured tourism transparent underground wall water