Fish raining from the sky are the cause of a yearly celebration in this small Honduran town.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A turquoise lake within a volcanic crater.

An underwater statue of Christ blesses the depths off Key Largo.

Inhospitable caverns just beneath this island paradise offer insights into alien worlds.

Cavernous opening completely encased in Karst limestone.

You may get stranded and everyone's peeing in the water, but at least there's cocktails!

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

The subtle interplay of fire and water is hard to ignore at this remote Jamaican spring.

One of the deepest blue holes in the world.

Nature took her revenge on the "Wickedest City in the World."

The world's widest single drop waterfall, and the two men who legend says went over its edge in a boat.

Divers can encounter an abandoned warship encircled by a giant kraken submerged in the British Virgin Islands.

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

Natural rock water slides hidden in the remote forests of northern Idaho.

A spectacular cave and a beguiling lake.

A vortex fountain that seems to rise out of the ground.

Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

An internationally-recognized dark sky sanctuary lies in northern Nevada, near the Oregon line.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This former hydraulic laboratory is now a woodland dotted with old engineering models.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

A 22-million-year-old sandstone cave is a natural habitat for award-winning cheese.