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

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

What happens when a sculptor has to find a way around a 100-year-old copyright.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Antiques shop filled with all manner of curious collectibles.

360° views of the city plus five floors of optical illusions and hands-on science.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The remains of the great moral philosopher reside in a university in London.

One person's lost luggage is another person's treasure.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

See massive fossils that are over 200 million years old in northeastern Arizona.

Bermuda triangle lighthouse, site of mysterious disappearances, left to crumble into the Atlantic.

An explosion of natural color known as "the river that ran away from paradise."

The home of the Dead Sea Scrolls is an abstract modernist dream.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

Statue commemorating the use of ether in anesthesia.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

Shelves covered in dozens of coffee bean varieties fill this North End institution.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

Historic Hull Street was actually the first street with a proper name in the Boston area.

Narrowest house in Boston.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.