Vatnajokull Glacier Caves (Iceland)
Glacier caves are incredibly beautiful, but they are also dangerous and have short life spans. Every year, caving experts seek out the coolest ice caves in Vatnajokull, Iceland. These incredible caves glow a brilliant blue color and are very cold.
Cave of Crystals (Mexico)
The Cave of Crystals is located nearly 1,000 feet underground and features some of the largest crystal formations in the world. These massive gypsum crystals are as much as 36 feet long and were formed from ancient volcanic activity.
Škocjan Caves (Slovenia)
Škocjan Caves is one of the world’s largest cave systems and features a river running through almost the entire length of the caves. Probably the most impressive site is Martel’s Chamber, which is one of the largest underground chambers in the world.
Mutnovsky Volcano Ice Cave (Russia)
The area around the Mutnovsky Volcano in Russia is a strange mix of fire, water, and ice. Tucked away under the surface is this incredible 300-foot ice cave that follows a small mountain stream.
Cave of Swallows (Mexico)
When you can base jump into the mouth of a cave, you know it’s awesome. The Cave of Swallows is located in San Luis Potosi, Mexico and is the largest known cave shaft in the world. The opening covers over 3,000 square meters and goes so deep that a skyscraper could fit inside of it. Climbing back up from the bottom can take up to two hours!