Introduction to Meteor Tiankeng: Meteor Tiankeng, named after its shape like a shooting star, is the second largest among the Dashiwei tiankeng group and is the oldest among the 29 tiankeng in Dashiwei. 1339 meters, the underground river in the tiankeng has changed its course, so it has become stable and there is no more geological activity. Climb the Meteor Tiankeng Observation Deck to see the majestic appearance of the Tiankeng from a distance.