Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

The only museum with its curator—and her pets—buried inside.

Where Venice's gondolas go for a tune-up.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

100 year tradition of fist fights, marked by marble footsteps.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Go inside to really appreciate this 500-year-old technological masterpiece.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A spectacular cave and a beguiling lake.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

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

Where commuters walk through remnants of an ancient Greek necropolis.

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

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

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

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

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

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