These items are all that remain from the room used by the author during his second tour of the U.S.

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

Museum dedicated to awful artwork.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

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

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

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

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.

Built in 1821 using rooms from another estate, the Phillips House is the only historic home on scenic Chestnut Street open to the public.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A crumbling hospital from the 1850s on Roosevelt Island.

A memorial marks the library lobby where Langston Hughes' ashes are buried.

You must take the A train... to the last active cemetery in Manhattan.

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

A Manhattan Episcopal church with an eerie underground crypt.

A Japanese pilot crash-landed on this Hawaiian island after the Pearl Harbor attack and terrorized locals for a week.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

Where the line between entertainment and aerospace blurs.

The so-called "Statue of Liberty of Los Angeles" is on a one mutant mission to keep L.A. weird.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.