This graffitied 19th-century building was a prototype of European industrial architecture.

An often overlooked ancient site in downtown Athens with substantial history (and nature).

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

This little Greek plateau is home to thousands of rustic, white-sailed windmills.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

Atop this electronic store resides a massive fighter jet.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

Historic church where a number of Shakespeare's actors are buried.

A decommissioned tube carriage within a London museum hosts a regular pop-up supper club.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

This historic building displays the remains of a victim of the devastating 14th-century plague.

The commemorative stone column conceals a secret laboratory.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

Crushed coral and crystals give the sand its signature coloration.

The location of the last witch trials of Italy, known as "The Salem of Europe."

Giant, pink stuffed rabbit on an Italian mountain.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

Abandoned medieval hill town.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

Ruins of a 10th century church tucked away deep in a botanical garden.

This 16th-century monastery has been turned into a surrealist architecture compound.