Starting with nothing more than discarded conch shells, one man has built an island/bar that would make Jimmy Buffet jealous.

This abandoned Croatian stronghold never saw a great deal of conflict but it is still a beloved relic nonetheless.

Caves that can't seem to quit producing the remains of prehistoric humans.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

This small town in Germany was once a center of peppermint production, and has the museum to prove it.

A burnt-out motel with priceless Native American artwork in the basement, redeveloped into apartments.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

Looking like nothing more than a cartoon deserted island, this tiny sandbar is home only to a single umbrella.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Since the 1700s, this old barrel has acted as a post box that relies on the kindness of travelers.

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Two women with a flair for both adventure and artful clutter created this singular round home.

The final resting place of the world's first nuclear reactor.

This pair of small sea rocks has been "wed" using rope and ancient Shinto tradition.

Take a cruise with no movement but plenty of style in this one-of-a-kind boat mall.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

This town near Nagasaki is flecked with fruit-flavored bus stops.

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

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.