This replica of the Greek structure is in the heart of Nashville.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Rare recess caves fill this unbelievably beautiful Ohio park.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

An unassuming 13-acre park is home to over 12,000 roses.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

"Satisfying" is a good way to describe these beautifully aligned rows of Spanish mills.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

The oldest Roman lighthouse still in use.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

The remains of an encyclopedic sculpture garden later used as an internment camp.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

Giant granite sculptures representing family on the northern coast of Spain.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This house's itty bitty size means no humans allowed.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

Turntable anonymously received orphans, alms, and groceries.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.