In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

Depending on the region's rainfall, this church may be partially submerged.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

This monumental work of art symbolizes the coming together of a previously divided city.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A monument at Alicante Marina honors a little-known hero of the Spanish Civil War.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Notorious artist squat renovated into legal studios.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

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

The last king of Poland was interred in this church nearly 200 years after his death.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

The final resting place of the last "gypsy king" of Poland.