Hundreds of notes give thanks to the patron saint of lost causes.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

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

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

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Remnants from a time before electricity.

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

If you fly into Edinburgh Airport, it's possible to spot this prehistoric site without even getting off the plane.

A magnificent tomb that was the final resting place of the Dukes of Hamilton.

“It has nae lugs!”

A double cantilever system bridge that was designed to prevent flood damage.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

In 1990, this 37-foot red steel bottle sailed from New York to England.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

The fountain marks the area where hundreds of accused witches were burned at the stake.

A sweet symbol marks the place where torturous executions were once carried out.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A marvel of Byzantine engineering under the streets of Istanbul.

Turkish adventurer antiques in the heart of the Grand Bazaar.

A sixth-century Byzantine cistern hidden below a modern carpet store.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.