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

The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.

A preserved portion of an ancient Athens barrier is displayed in a hotel basement.

This fairytale-looking castle is a wonderful example of Greek neo-Gothic architecture

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

The ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

The ruins of an ancient fortification wall sit in front of and underneath this boutique hotel.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

This 18th-century former mosque held the first Hellenic Parliament.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

A staircase made of gravestones leads up to this church built into a giant rock.

Step inside an ancient beehive tomb built for a mysterious cult hero.

The secular incarnation of a religious meditation.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

The historic building has preserved human organs, unusual hexagrams, and scars from a political assassination.

This beehive tomb built for royalty sat hidden for over 3,000 years.

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

The heads and relics of 179 monks slaughtered by pirates are on display within this Ceonobic Monastery.