A spiral staircase twists to the top of this unusual Czech lookout tower.

Mysterious painted skulls in Moravia.

The romantic botanic tunnel feels like a well-kept secret.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This hidden art nouveau gem was designed by an architect in search of a national style.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

Two monstrous faces loom over a village in Czechia.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Walk through Czech history in Prague's largest graveyard.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Countless grotesque faces stare out from this eerie Prague art wall.

A Jenga-style cylindrical tower of books that appears to go on forever.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This artificial cave looks like something out of a fairytale.

Moss and stone turn this waterfall into an otherworldly liquid veil.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

This charming wooden church was disassembled and moved not once but twice before settling in this Prague garden.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Two stunning 17th-century libraries and a cabinet of curiosities.

Macabre astrological automaton clock dating to the late 1400s.