A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Macabre astrological automaton clock dating to the late 1400s.

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.

A century-old prison in the heart of Vilnius is now a lively bar, dance club, and artist residency.

An abandoned masterpiece of Soviet Brutalist architecture.

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.

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

The 5,000-year-old megalith is believed to be Scotland's tallest standing stone.

First established in 741, this is one of the oldest Taoist temples in China.

A spherical "micro-nation" in the heart of Vienna.

Pilgrimage site for star-crossed lovers.

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

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

Copenhagen's celebrated theme park and gardens.

The rocky remains of an ancient Greek forest.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Op-art architecture designed for happiness.

Stockholm's tiniest statue is of a small boy looking at the Moon.

The curios of pharmacist and collector Henry Wellcome.

This abandoned Slovenian military barracks has become a punky-political art squat.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This castle has links to Portugal’s founding and struggles for independence.