The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

America's oldest archaeological site or a muddled case of wishful thinking.

An eccentric inventor's castle home with its own indoor weather system.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

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

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

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Now home to hardy plants, these sand and gravel dunes once held back a massive prehistoric lake.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

An abandoned gun-funded 19th century utopia.

This Connecticut chapel is a starkly modern, and surprisingly colorful, architectural rebel.

Reputedly based on the tomb of Jesus Christ, this crypt is the oldest surviving structure of any cathedral in England.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

This industrial museum is based on one of the oldest standing iron forges in the U.K.

A mysterious shape catches the eye in this 16th-century painting.

The abandoned coal loading dock is a canvas for unsanctioned art.

For 60 years, the academy had no permanent location until members voted Washington D.C. as its forever home.

This no man's land slicing through the island is strewn with abandoned relics of another time.