Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

A tiny monument to the classic American candy.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

Impossibly life-like natural history models created out of glass by a father and son.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

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

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

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

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

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

An 1883 schoolhouse now home to collective of artists.

19th century cemetery hidden in Brooklyn's Prospect Park.

Records of the dead describe the myriad odd ways people used to die.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Where America's first doomsday cult awaited the end of the world.

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

The legendary building that needed ghostly approval before being built.

A massive, abstract lookout tower providing a panoramic view of Prague.