A river runs through this remote valley in a very unexpected way.

Two Civil War-era cemeteries stuck between runways at the world's busiest airport.

Akureyri is home to an oversized can of one of Iceland's favourite beers.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A crumbling hospital from the 1850s on Roosevelt Island.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Odd outsider art installations surround a Gold Rush-era ghost town.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

The world's only pure blue lizard lives exclusively on this secluded tropical island.

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

Locals call this magical moss-covered walkway the "Emerald Path."

The narrowest street in Paris.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

The world's tallest circular building is loaded with symbolism, but many just see a big donut.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

This giant sculpture made of trash is a critique of society's wastefulness.

For decades, it has disappeared and reappeared as water levels rise and fall.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The park is home to the United States's only still-operating Dutch windmill.

This "floating railway" is one of the world's oldest monorail systems.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.