Visitors wanting to experience the ice caves of Iceland will need to fly to Reykjavik first. From there, visitors have a choice of locations. The Katla ice cave inside the Kötlujökull glacier is ...

Travel blogger Stewart Curtis and friends Taylor Holt, Smith Christenbury, and John Christenbury took their motorboat into the stunning Blue Cave on the island of Meis, Greece. This breathtaking ...

Or you can go on a guided tour of Blue John Cave or Treak Cliff Cavern, which both have large deposits of Blue John Stone, a mineral unique to the area.