This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Jesus' footprints and the first catacombs in the world.

Modern art commemorates one of the first military actions of World War II.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The abandoned summer estate of the former Greek Royal Family.

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