Structure built from the skulls of vanquished foes.

In this German city center, the streets have no names.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

The crumbling ruins of an abandoned 12th-century monastery.

A church of bones, decorated with 40,000 human skeletons.

Over time, this castle grew to encompass the entire island.

An ode to Japanese artist Hokusai, with a bit of a comical twist.

Wander around the extensive remains of this 12th-century medieval church.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

A hidden three-foot-wide house separates these two regal churches.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

An abandoned anti-smuggling station decays along the boundary between Portugal and Spain.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

A 2,000-ton rock resting in a state of a delicate balance.

A stone wall commemorates the legend of a ferocious dragon who literally got his butt kicked by a knight.

This temple was constructed entirely by Roman soldiers.