Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

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

A saintly relic hidden in a Prague church basement.

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

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

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.

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

Countless grotesque faces stare out from this eerie Prague art wall.

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

Steadily reminding Czechia of its past.

This Roman archeological site is hidden amid a 1930s housing estate.

This gorgeous space is England's largest independent library outside of London.

The largest timber structure in Europe.

The remains of a Dominican friary, once one of the largest of its kind in the United Kingdom.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

A famous pilgrimage site that remains hidden in the midst of a city.