Colonial architecture meets urban art in this sprawling open-air gallery.

The walls and ceilings of the "Mexican Sistine Chapel" are almost completely covered with mural, sculpture, inscriptions and oil paintings.

A quirky and charming restaurant founded by artists.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

These azure waters were thought to lead to the Mayan Underworld.

Part bookstore, part café, and part forest.

Frida Kahlo's childhood home, now a museum of her life and works.

An Aztec snake god has taken the material form of an apartment complex.

This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

This dreamlike museum is filled with the works of an influential surrealist artist whose name you may have never heard.

Historic poems about the noble act of defecating have been preserved on the wall of this old convent.

The ancient latrines of the Greeks, in all their public glory.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

The best-preserved Roman small town in North Africa.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned stretch of highway, deteriorating next to the operational one.

Where America's first doomsday cult awaited the end of the world.