In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

One of the now-less-hidden floral gems of the "Emerald Necklace."

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Giant, friendly pelicans in Central London, the most unlikely of places.

A hands-off space for graffiti artists to hone and display their skills.

A tongue-in-cheek arcade where the games are based on everyday life.

An unusual round church in London with a Templar past.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

Secret North Korean passage discovered below the world's most dangerous border.

South Korea's women of the sea have completely flipped their society's structure by becoming revered fisherwomen.

Northern Ireland's Brobdingnagian stepping stones.

A wall of chewing gum moonlights as collective art.

A giant Troll lurks under one of Seattle's oldest bridges.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

The largest and most famous wax anatomical collection anywhere in the world.