The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Tubing through a cave lit with glowworms is a magical underground experience.

The longest hedge maze in the world.

A psychedelic labyrinth on the San Francisco bay.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

The fairy tale castle of the "fairy-tale king."

An eccentric artist's abode in this small Italian town has been transformed into a surreal temple of mosaic madness.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

An Italian vineyard invites religious pilgrims to stop by 24/7 to get their drink on, for free.

Crushed coral and crystals give the sand its signature coloration.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

Machismo turned on its head: the lady's hand goes to the dude with the bigger brain.

A lover's walk between hilltop towns, decorated with graffiti love notes.

The bomb-ravaged remains of of a colossal Neptune.

Italian cave with exceptional acoustics and an unsavory history.

This winding road through an Italian canyon may be the most scenic drive in the world.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

The world's most active stratovolcano is almost always erupting.