These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

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

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This man-made mound monument was built out of soil from all across the Polish empire.

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

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

Over time, this castle grew to encompass the entire island.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

A medieval setting reimagined into a unique art alley.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

A marvel of Byzantine engineering under the streets of Istanbul.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This abandoned hospital has a long history, having housed both German and Soviet soldiers in the course of its life.

A crumbling bakery where forced laborers from the nearby concentration camp toiled to feed their fellow prisoners and Nazi soldiers.

An abandoned swimming pool decays on the outskirts of Berlin.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

An eerie, derelict amusement park in Berlin.