A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Crushed coral and crystals give the sand its signature coloration.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

Five candy-colored villages on the Italian Riviera.

The glowing blue Nymphaeum of Emperor Tiberius.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This failed condo development was reborn as a street art hub.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

A view-altering observatory at the University of Texas.

A tourist attraction founded around a slumping cabin.

A massive sea stack famous for its appearance in The Goonies.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.