Scientists have confirmed the world’s largest underground thermal lake, known as Neuron lake, inside a cave in southern ...

Most of those who responded described the cave as triangular with a stone column supporting a stone overhang. That type of description would be classified by archaeologists as a rock shelter ...

A jungle inside a cave? A roof collapse long ago in Hang Son ... swifts are diving and cutting in the brilliant column of sunshine. The tableau could have been created by an artist imagining ...