America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

This impressive Boston holy house is the American mecca for Christian scientists.

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

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Illegal drag racing two stories beneath Chicago’s streets.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

Victorian "Fancy Craft" Hair Wreaths and Relics.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The world's longest and deepest train tunnel.

If James Bond bungee-jumped off the side of a 720-foot dam, would you do it too?

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

This sculpture commemorates a naturalist and an illustrator whose work was a forerunner to modern field guides.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

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

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.