Prepare for one of the most exhilarating experiences in spelunking—The Cave of Swallows (Cueva de las Golondrinas) in Mexico. Known for its vertical depth, this cave drops 1,200 feet into a giant chamber, making it one of the largest pits in the world. For adrenaline junkies, it’s a top destination for base jumping.
But even if you prefer to explore at a slower pace, you can witness thousands of birds (mainly swallows) emerging from the cave at dawn or dusk in a spectacular natural show. It’s truly one of the most dramatic cave adventures you’ll ever experience.
7. Phong Nha-Kẻ Bàng National Park – Vietnam
