The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Monument to a suicide protesting the Soviet invasion.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

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

Macabre astrological automaton clock dating to the late 1400s.

Two stunning 17th-century libraries and a cabinet of curiosities.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A tunnel with windows, so you don't miss out on the impressive views.

Legend says this sacred tree was a gift from goddess Athena.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

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

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

Europe's oldest still-operational tea farm also boasts a spectacular view.

The unusual patterns in this rock formation result from two distinct modes of weathering.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

This amazing oasis of art and plants is hidden on the outskirts of Marrakesh.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

A fortified city, home to a remaining population of five families

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Morocco's Argania trees are infested with nut-hungry goats.