Join us as we explore the legendary Four Entrance Cave on Pigeon Mountain, Georgia – all captured on GoPro. This wild cave system offers tight crawls, massive chambers, and multiple entry points ...

Getting into Nalanda. Trekking across deserts, passing through glittering Central Asian cities, and braving hostile mountain passes, the 7th-century Chinese monk Xuanzang arrived at Nalanda.

"They christened it in one medieval text as Ireland's door or entrance onto hell," said Mike McCarthy, a tour guide and author. It's also the birthplace of Halloween, or as the Irish call it, Samhain.