This historic Boston building has gone from personal estate to porn theater and back again.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

A men’s restroom became a sandwich shop.

Statue commemorating the use of ether in anesthesia.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A plaque memorializes the Boston location of one of the largest nightclub fires in history.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

Painstakingly built dioramas sit unnoticed in a Boston office building.

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

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

New York's southernmost subway station is whimsically wavy.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

An oasis of calm amid the chaos of the boardwalk, the museum traces the heritage of this beloved beachside amusement park.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

This small, hidden cove is home to abandoned boats.

Waterway populated with abandoned projects, including a submarine.

The flagship building of an early national restaurant chain is a superb example of terra cotta art.

This tree was warped centuries ago to serve as a botanical wayfaring tool.

A humble ode to the heroic air rescue efforts of the United States Coast Guard serving on the Great Lakes.

This small-town pizzeria won the Hollywood lottery.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.