Sloth rehabilitation center in the jungle of Costa Rica.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This Costa Rican topiary park is a surreal garden of unearthly delights.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Disused penal colony features prisoner artwork, some sketched in human blood.

A secret climbing tree hides along the side of a Costa Rican road.

"We Seceded Where Others Failed."

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

A monument celebrating the idea of reaching inaccessible places.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Visitors are welcome to enter this lush Key West sanctuary to entertain its plethora of rescued parrots.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.