Washington, D.C.
Potomac Park Flood Levee
This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.
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Washington, D.C.
This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.
Washington, D.C.
Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.
Washington, D.C.
The national park was once a plantation estate.
Washington, D.C.
The walls of the iconic dome are hollow and have a secret stairway.
Washington, D.C.
The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.
Washington, D.C.
A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.
Copalis Crossing, Washington
This grove of ghostly cedars was killed in 1700 by an enormous tsunami, felt from the United States to Japan.
Tacoma, Washington
This famous bridge twisted itself into oblivion, but not for the reason you might think.
Coulee City, Washington
Site of the greatest known waterfall that ever existed.
Rockport, Washington
The illuminated falls are a gem in North Cascades National Park.
Seattle, Washington
The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.
Ashford, Washington
The highest point in Washington state is a volcano covered in glaciers.
LaCrosse, Washington
An obscure waterfall that looks like something out of a fantasy novel.
Stevenson, Washington
An extraordinary mixture of natural beauty and man-made phenomena.
Port Angeles, Washington
Rustic natural hot springs in the deciduous rain forest.
Arlington, Virginia
This church built atop a gas station promises to "equip you for the next stage in your life’s journey."
Saltville, Virginia
This maze-like slot canyon is a unique gem within an already fascinating geological area.
Arlington, Virginia
This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.
Dayton, Virginia
One of the last active volcanoes on the Eastern seaboard.
McLean, Virginia
The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.
Richmond, Virginia
This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.
Richmond, Virginia
Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.
Duffield, Virginia
A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.
Natural Bridge, Virginia
A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.