This artificial cave looks like something out of a fairytale.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

A Baroque mansion with ties to legendary magicians and alchemists.

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

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

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

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

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.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

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

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

Steadily reminding Czechia of its past.

A hands-off space for graffiti artists to hone and display their skills.

This Roman quarry once held secret masses and smuggler's contraband and is now home to rare species of bats.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

There's an exclusive Beefeaters pub hidden in the Tower of London.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The ritual has been performed uninterrupted for nearly 700 years.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Giant, friendly pelicans in Central London, the most unlikely of places.