The only structure left with direct ties to the Salem witchcraft trials of 1692.

Friction between grains of sand cause a curious "singing" sound.

Scary metal statues adorn some of the signature buildings of Burlington, VT.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

Breathtaking and huge 430 year old maps of Italy.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Catacombs turned marketplace.

Ancient snack bar of the Roman Empire re-opened.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Secret refuge and museum of the Duke of Florence.

Ship-sized kinetic sculptural fantasy.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This bridge was constructed from the rubble of the infamous Bastille.

Regency-era excess on the English Coast.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Canada's subterranean Cold War museum has doubled as a movie set.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The beams of the New College, Oxford dining hall come with an amazing story.

Used as an example in one of the first dictionary entries for "museum" in 1706.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.