This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

The Guardian of Tallinn.

A symbol for the opposition to nuclear power around the world.

A public display of random paleontology.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

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

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

This spooky statue sits outside a famous Prague theater.

A surreal statue honoring Prague's favorite literary son.

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

Steadily reminding Czechia of its past.

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