A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

The world's largest ecosystem of its kind is home to South America's only native species of bear.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

A little known Colombian theme park of giant curiosities.

An unusual art exhibition in a suburban yard is designed to awaken the souls of those flowing by.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This vast kitty-themed collection illustrates the history of human-cat interaction.

Hidden amid a collection of trails is the site of a tragic crash.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

Island, once a pirate hideout, now home to an abandoned resort.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

A 300-foot-long Cold War submarine floats in a Chilean River as a maritime museum.

The rusty hull of this 1899 ship serves as a tribute to explorers of the bottom of the world.

This once-derelict building is now one of the most beautiful bookstores in the world.

Museum devoted to the artificial language of Esperanto.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

A vast Communist-era exhibition space in the Bulgarian capital.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

Eastern Bloc nostalgia, anybody?

A collection of art from Bulgaria's time as a communist state.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.