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

An eccentric inventor's castle home with its own indoor weather system.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The Boston square dedicated to the dark poet who was born nearby.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

A technicolor place of worship for Elevationists.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

Home of the International Space Hall of Fame.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

Its history includes dinosaur fossils, cattle rustlers, Georgia O'Keeffe, and a mythical giant rattlesnake named Vivaron.

Eat like pre-Columbian Native Americans in this New Mexico restaurant within the Indian Pueblo Cultural Center.

This replica of the Indian spiritual master Meher Baba's tomb stands unfinished in the New Mexico desert.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

The final resting place of the most famous outlaw in the Old West.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

A frozen oasis lies beneath the scorching New Mexico desert.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

The state bird of New Mexico, constructed entirely out of garbage.

It's easy to see why this eclectic architectural wonder has been dubbed the "Spaceship House."