A smoke stack so large, the Washington Monument could fit inside!

A tourist attraction founded around a slumping cabin.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A vertically floating hemlock controls the waves and weather at Crater Lake.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

Watch the newest land on the planet form before your eyes.

A true treehouse near Hawai'i Volcanoes National Park.

A controversial memorial at the place where Captain Cook met his violent end.

One of the deepest blue holes in the world.

The remains of the great moral philosopher reside in a university in London.

Eighty million natural history specimens call this gargantuan museum home.

Giant naked man on a hillside.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

Famously misunderstood wonder of the ancient world

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Iconic rock formations that allow for exploration during high or low tide.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The world's tallest statue of an American hero.

Resting place of the Texas A&M canine mascots, who watch the game from the grave with their own miniature scoreboard.