around china -natural pattern in the rocks - the impressive fengshuidong cavern with water pool and stone bridge

and around asia blue boy bridge cave caver cavern china colored colors complex danger deep destination electric event family famous favorite features fengshuidong for formations geology illuminated impressive inside interest known led lighted lights limestone man mine natural naturally orange path pattern photograph place pool pose provide reflection rocks scultured stalagmites stalagtites stone stonebridge stop system tourist travel underground walls water wet