The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

These free-roaming horses were once destined to disappear from the land.

This hidden workshop is filled with molds of France's most iconic sculptures.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

A trio of giant megalithic stones in the middle of a golf course.

This tiny structure was built by the creator of the Brooklyn Bridge.

The only one of New Hampshire's original 14 World War II watchtowers to survive in near-original condition.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

The world's first underwater farm is home to more than 700 plants.

The oldest apple tree in the Pacific Northwest.

An ancient octagonal weather station named for the eight Greek gods of wind.

This unique zoo is the only place in the world where you can see all 15 species of crane.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

Every Tuesday, students let off steam by screaming into the night air.

Grab a cuppa at England's first and only domestic tea plantation.

Two dozen pinball games hidden away inside a most unlikely location.

Local lore says passing infants through its holes could magically cure them of measles and rickets.

A restored 1920s cascade stairway provides one of the best views of Oakland's Lake Merritt.

This abandoned beacon is moving closer and closer to the sea.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.