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

Where the Great Wall of China meets the sea.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

The villagers of the coldest inhabited place on Earth adjust to unique challenges presented by day-to-day living.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A perfectly running 230-year-old silver automaton and music box.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

The giant scales in this museum can still tell if someone is one of the devil's brides just by weight.

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Elaborate hand-carved wooden clocks two brothers made in their spare time are on display at this handsome little museum.

A gigantic sculpture garden is packed with innovative oddities.

The ghostly remains of what was once the world's richest copper mine.

A short hike into the mountainside forest reveals a decaying 1890s town.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A walk through the historic city center, under the streets of Seattle.

Houses are tucked between, on, and underneath giant boulders.

An abandoned saucer-shaped monument in the Bulgarian mountains.

The mayor made the declaration in 2004.