An ancient ossuary in Rouen.

His "Lionheart" is entombed separately from the rest of his body.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

The encased skull that is widely believed to belong to St. John the Baptist.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

A massive base for the Nazis' most formidable weapon in the Atlantic.

These traffic lights celebrate the 100 year anniversary of the women's suffrage movement in Lithuania.

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

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

An abandoned masterpiece of Soviet Brutalist architecture.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

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

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

The pyramid and dome deep inside the Dzūkija forest are believed to channel divine energy.

Once known throughout Europe, this tiny and unusually progressive 18th century micro-nation within Lithuania now lies in ruins.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

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

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

No matter how many times this community-run sauna gets destroyed, it always rises from the ashes.

This flagship of the Mexican Navy has had a bumpy second life after being retired from service.

Space-age monument to an early 20th-century uprising.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.