A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

Home to items never before seen by the public.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

The romance of early commercial flight still fills this Art Deco destination.

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

At 207 feet, one of the world's longest continuous escalators.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

The Cadillac Ranch for monster truck aficionados.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

One of the best places to see wild Colonial Spanish Mustangs in the United States.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

This old-fashioned carhop restaurant gave the world the waffle cone.

One tiny triangular park commemorates the victims of a yellow fever epidemic—many of whom are buried right below the grass.