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

Trash escaped from a landfill to fill beaches with all kinds of treasure.

Hill-like structures formed by glaciers and sandy spits of land.

Solar powered Spectacle Island features all-green facilities.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

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

Historic Hull Street was actually the first street with a proper name in the Boston area.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

The "Seinfeld" diner.

Try not to get slimed in Tribeca.

A serene plaza that commemorates one of the Granite State's most iconic figures.

A beautiful Gilded Age hotel in the White Mountains with surprising diplomatic history.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

These whimsical works of art tell the story of the city's past and present.

Narrowest house in Boston.

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

A men’s restroom became a sandwich shop.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

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