An ancient octagonal weather station named for the eight Greek gods of wind.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

The prototype for all Nazi concentration camps.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.