This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

A quarter mile off the coastal tip of Maine you'll find the "Beloved Island" of Franklin Delano Roosevelt.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

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

An overlooked memorial honoring the local Washington residents who died in World War I.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The most historic church in Fairfax County played a role in the creation of the American Red Cross.

These unusual rooms on wheels are holdovers from the 1960s.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This university transit system is a 1970's vision of the future.

FDR's Art Deco hospital tower was hopelessly inefficient.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

Built by the patriotic residents of Boonsboro in a single day.

A local prank turned town icon.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

A super-sized promotional trick that is now a D.C. landmark.

The maritime museum that boasts the largest nautical library in the western hemisphere.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

A field of nothing but boulders which resembles a giant's gravel driveway.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.