An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

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

A Byzantine-era church hidden in a wooded area below the Acropolis.

Where commuters walk through remnants of an ancient Greek necropolis.

The ruined doorway is a portal to the building's turbulent and torturous past.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Legend says this sacred tree was a gift from goddess Athena.

A sharp sculpture made of thousands of pieces of jagged glass.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

The eclectic seaside sanctuary caters to a rather fowl crowd.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

These lesser-known Maltese catacombs date back over 1,700 years.

This unique building in the main square stands out among the city's typically Baroque architecture.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.