A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

A self-built castle made by a mysterious man.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

This small, unassuming street is now a canvas for color and creativity.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

An abandoned concrete jungle surrounded by a lush park.

This abandoned prison castle has become an imposing gallery of graffiti art.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This historic patch of real estate offers a glimpse of colonial Boston.

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

This giant Boston statue of Mary is standing on a globe to show her power over the universe.

The massive machine creates cracking displays of indoor lightning.

"Mock all and sundry things, but leave the saints alone."

Radical Bookstore and Community Space.

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

Dim sum, served in a grand old theater.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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.

A beautiful Victorian-era cemetery, complete with a miniature village.