An abandoned hotel in the highlands of Bali is shrouded in stories of ghosts, curses, and corruption.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

A collection of old neon signs from all over Poland line a secluded courtyard.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

Where visitors can play more than 150 retro arcade games.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An old slaughterhouse now holds the largest collection of pig artifacts.

This old wooden funicular railway leads to a cemetery in the forest.

A limestone grotto where daylight filters in from below and turns the water a beautiful turquoise. Also home to a small underwater nativity scene.

Beautiful views and Roman-style statues on the Italian coast.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

This beautifully preserved Ottoman house is steeped in history.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

This 16th-century house tells the city's history through old artifacts and quirky tales.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

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