This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This lucky bronze frog was gifted to Madrid by a casino.

An ancient Egyptian temple in the middle of Madrid, Spain.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

An early 20th-century bullring converted into a modern shopping center.

Long tunnels run under the ancient chariot racing circuit to the tower.

Stunning Roman aqueduct used for 1900 years and still standing.

The underground sanctuary of a mysterious ancient cult.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

How did a French journalist’s grave become the sexiest statue in the cemetery?

This medieval monastery represents an architectural blend of eastern and western European culture.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

A tiny church on a man-made island in the Adriatic.

A curious cave church carved into the face of a cliff.

This subterranean necropolis holds three floors of antler-dug grave caves.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Christianity and Islam have clashed, yet here a Serbian Orthodox church and a mosque stand together.

A 11-foot former president stands on a Kosovo street that also bears his name.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

A futuristic, brutalist masterpiece that is also strangely prison-like.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The vast, legendary catacombs hold secrets much stranger than stacked bones.