A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Soaring over the Niagara Whirlpool since 1916.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Medieval torture techniques with a modern conscience.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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

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

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

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Gladiators once walked this ancient, subterranean passage.

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

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

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.

Once a black market electronics marketplace, now an otaku shopper's paradise.