An abandoned textile mill that is now home to art and concerts.

Final resting place of a pioneering scurvy researcher.

A monument to the groundbreaking environmentalist sits near the place where she first experienced the sea.

Marigolds, rosemary, Madonna lilies, and the Virgin’s Bower decorate this Massachusetts sacred garden.

A sculpture in Hyannis commemorates Chief Sachem Iyannough of the Mattachiest tribe.

This elaborate High Victorian Gothic structure is one of the world's few 16-sided buildings.

A pair of 19th-century granite markers symbolically record where the state boundaries of New York, New Jersey, and Pennsylvania intersect.

Beneath its placid surface, one of New York City's primary sources of drinking water hides a haunted past.

A wooden rollercoaster that still delivers a thrill.

The largest living museum in the Northeast recreates life from the Early Republic period complete with costumed historians and reenactors.

The first transatlantic wireless communication between the U.S. and Europe took place here in 1903.

The colonial home of Paul Revere during the American Revolution.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.

Over the last century, this elegant columned facade has been home to the headquarters of a bank, several nightclubs, and a restaurant.

A poet’s rustic cabin, rescued from demolition and tucked into Rock Creek’s greenery

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

A rare example of a rural school in Washington, D.C.

A monument first built to honor Confederate soldiers now honors their Union opponents.

Once used by British troops to gather water prior to the Battle of Bladensburg.

A solid steel plane designed to catch fire over and over again.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

Above the heads of passersby stands a small statue commemorating soldiers from the Boer War.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.