This unique architectural wonder is home to luxury apartments.

Nearly 40 miles and 1,000 years of limestone mines under Denmark.

The highest point in Denmark has been a matter of dispute for over 80 years.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

Denmark’s never-ending bridge.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

Seven dragon statues—including one that breathes real fire—are scattered throughout the streets of Krakow.

An 18-meter-long sarcophagus of a constantly growing dead prophet.

This legendary dive bar boasts a collection of over 1,300 clown figurines.

At these downtown crossings, pedestrian lights show axe-wielding Vikings instead of the usual walking figures.

The medieval ferry service has been going strong since the 14th century.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

This sculptural representation of an Andersen fairy tale had to be pushed away for being too grim.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

A map store filled with original Cold War era Russian maps of the world.

Flamboyant architecture from the turn of 20th century.

The statue of a legendary giant who carried Christ and shouldered the world's sins.

The oldest housing complex in Riga is a mini timeline of architectural trends.

A black cat protests the City Guild in Riga's Old Town.