The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

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

An alien church provides much needed silence in the midst of a Finland shopping center.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

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

This abandoned Greek island was the last active leper colony in Europe.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

A little-known park with unusual, half-ruined structures and a mystical energy.

An abandoned Byzantine fortress and notorious prison.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

Special benches that play Chopin's music are scattered throughout his native city.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

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

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

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.

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