After four years of closure, Crystal Cave is reopening this month in Sequoia National Park. Learn why it was closed, how to ...

Technically, there is a hiking trail, but its sole purpose is to deliver you to the cave entrance. The Trail does afford some beautiful views of the area, but I wouldn’t take the time if you ...

The island of Kastellorizo holds a natural wonder that remains one of the country’s best-kept secrets: the Blue Cave.

Without boots or machinery on the ground, it's hard to tell what is a cave entrance, and what is simply a hole. And it's impossible to know how far any of the caves extend beneath the surface.

Both caves are part of one of the world's longest ... lack of crowds and overall beautiful setting. Some visitors recommended kayaking through the mangroves as another way to fully immerse ...