Since 1947, this living history museum has been providing an immersive look at life in Plymouth Colony.

These three lighthouses played a fundamental role in the maritime life of Eastham.

The largest glacial erratic boulder on Cape Cod.

The Cape Cod house that whaling built.

Hundreds of personalized inscribed planks make up this historic boardwalk.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

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.

Stone monument honoring a town founder has a witch-boot shaped stain and a curse to go with it.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

Largest institutional collection of tomb figures from Western Mexico in the United States.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The oldest continuously operating fish market in the United States.

Home to items never before seen by the public.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

Decades before the scandal, this staircase on the river was a literal "water gate."

Look closely and you’ll notice that the color changes a third of the way up the tower.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

This abandoned subway station can still be seen on regular commuter trips.

The most confusing clock in New York.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.