Stroll through a wonderland of stupendous moss-covered trees.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The former home of the 11th president of the United States.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

Bananas are often left for the first monkey America ever recovered alive after being launched into space.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The world's longest known cave system.

The final resting place of one of Thomas Jefferson's formerly enslaved sons.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

This automated sculpture of two men peeing will spell out text messages with their micturition.

Monument to a suicide protesting the Soviet invasion.

Steadily reminding Czechia of its past.

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

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

Macabre astrological automaton clock dating to the late 1400s.

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

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

This spooky statue sits outside a famous Prague theater.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.