The Blue Grotto (or Grotta Azzurra) is the most famous site on Capri, and it's easy to see why. The grotto is a natural sea cave with a small entrance, and it is illuminated in a blue and silver ...

Editor’s note: This story originally published in January 2021. It’s raining, but there isn’t a cloud in the sky. Crystal-clear droplets break on my shoulders as I take off my hat, close my ...

Local police were called to the Twin Caves complex, situated at the Blue Springs Recreation Area in Marianna, Florida, on ...

If you love sea lions, make sure you bookmark this sea cave in Oregon. Close to the City of Florence, you'll be in awe at the ...

This story appears in the August 2010 issue of National Geographic magazine. We sink into Stargate, sweeping the void with our dive lights. Fifty feet from the surface looms a pale haze, less ...

Kayaking through cavern systems is one of the most unique adventures anyone can experience. The thrill of exploration ...