The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

The two writers famously didn't come to blows over the Oxford comma.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

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

Last church of this militaristic WWII style.

Civil War-era Fort designed to withstand invasion and attack, with tricky traps called "murder holes."

This giant Massachusetts sycamore is said to hold the dubious distinction of being the "widest tree East of the Mississippi!"

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

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

Haunted boulder in a front yard with a witch painted on it.

One man’s hobby is another man’s world of metal wonders.

Founded by the famed children's book artist, this museum spreads an appreciation of the arts through picture books.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

The filming location of a shark attack in Steven Spielberg's famous shark movie.

This roadside attraction attracts kids with dinosaurs before blindsiding them with geology.

This rare symbol of Eastern philosophy in the West has been created over years of painstaking construction by the local community.

Hut with supplies for shipwreck survivors.

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