The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

The world's largest rotating world.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The oldest surviving synagogue in New York City is now a soaring art space.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

A toxic ghost town sitting atop a massive coal fire.

Exact replica of the ancient monument, but much, much lighter.

A massive sea stack famous for its appearance in The Goonies.

A Roman-style column in Oregon hides a spiral staircase inside.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

The youngest volcano in Central America.

The magic's in the hole!

The seamy, underground secrets of Portland's criminal past.

340-foot statue built to honour the Heroes of the Soviet Union.

Gargantuan home of Russian science.

Moscow's imposing monument to the Space Age.

World's largest bell sits on the grounds of the Kremlin in Moscow.

The Guardian of Tallinn.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.