This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The topiary maze at the Habsburg hunting lodge.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A Christian monastery stands on what was once a holy Incan temple.

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Life and death are on parade at the most reliably perilous site of “the Great Migration.”

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

Go surfing on this urban wave, "hacked" by local surfers.

A small but immensely extravagant palace built by the "Night King."

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

The fairy tale castle of the "fairy-tale king."

The king of U.S. high points towers over every other peak on the continent.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Home to items never before seen by the public.

The fifth-longest natural arch in the world, and the longest outside China.

Be(w)ar(e) the moat around this historic Czech castle.

This ruined castle perched atop a rocky peak is a great place for a hike.

Step inside Lucy, the world's largest "elephant."

Experience what life was like in Ireland during the Viking and medieval ages.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.