This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

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

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

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

The oldest funicular in Lithuania has been climbing this steep hill since 1931.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

A wide array of locomotives call this outdoor museum home.

An abandoned masterpiece of Soviet Brutalist architecture.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

A 15-foot-tall statue of the head of the Sopranos family greets passengers at a train station in southeastern Lithuania.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

A miraculous three-handed portrait of a saint can be found inside this church.

This magnificent Art Deco church is a reflection of Lithuania’s turbulent history.

Ever-growing collection of devils in art.

Amsterdam's former hotspot for public executions and dissections.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

Where royalty waits in the height of luxury.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

This historic Amsterdam bar used to accept sailor's monkeys as payment.