An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A reproduction of earth's many biomes.

An off-the-beaten path cave with an underground lake.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

Giant telescope mirrors built in a spinning furnace under a college football stadium.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

This small, unassuming street is now a canvas for color and creativity.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

A mysterious "wedding cake" castle in the middle of the urban desert.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

A geological mystery on Camelback Mountain.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

This Canadian city is actually two-in-one, even if they only respect the timezone of one side.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

Dynamite factory turned museum explores the history of explosives.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

A climbing route in the mountains of Italy’s Dolomites, built for soldiers during World War I.

Meet the oldest inhabitants of this Italian hamlet, a series of oddly preserved mummies.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

When you're a great Russian Tsar, even your vomit gets a statue.

A huge old mansion full of thousands of toys, each there to be used and played with.