Three large boulders covered in mysterious carvings and graffiti.

A humble ancient well where Scottish knight, Sir William Wallace, took his final drink.

Water-themed sculptures guard this unusually square structure.

This remarkable sculpture symbolizes the regeneration in this Glasgow suburb.

The castle that provided the setting for much of 'Monty Python and the Holy Grail' is now a pilgrimage site for fans.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

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

A crucified and bearded female saint.

The hidden lair of an alchemist rediscovered in a 2002 flood.

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

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

Dedicated to the works of the legendary special effects artist.

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

A Jenga-style cylindrical tower of books that appears to go on forever.

This doorless 20th-century elevator doesn't stop or slow down.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

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

A series of playful yellow penguins share a serious message about the environment.

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

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.