This former quarry is now a picturesque gorge that hides a sunken lake.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Two monstrous faces loom over a village in Czechia.

A church of bones, decorated with 40,000 human skeletons.

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

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

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

A former squatter's paradise outside Prague.

Steadily reminding Czechia of its past.

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.

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

An Orwellian sculpture with eyeball cameras watches passersby.

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

A mocking tribute to the past and modern leadership of Prague.

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

This artificial cave looks like something out of a fairytale.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Walk through Czech history in Prague's largest graveyard.

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

In the waters outside Helsinki, a tiny island once used as a military outpost now welcomes visitors.

Hundreds of signs pointing to the birthplaces of current Helsinki residents form stalactites on the ceiling of the cave-like Kamppi metro station.

No matter how many times this community-run sauna gets destroyed, it always rises from the ashes.