Washington, D.C.
Lincoln Memorial Undercroft
A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.
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Washington, D.C.
A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.
Washington, D.C.
A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.
Washington, D.C.
A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.
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.
There’s a hidden military meme engraved on the World War II Memorial.
Washington, D.C.
Decades before the scandal, this staircase on the river was a literal "water gate."
Washington, D.C.
The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.
Washington, D.C.
On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.
Philadelphia, Pennsylvania
Walk down an otherwise nondescript alley near Washington Square West in South Philly and find yourself in a vivid, immersive mosaic wonderland.
Sharpsburg, Maryland
A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.
Sharpsburg, Maryland
This is the cabin from which John Brown and his men launched their fateful war to end slavery on October 16, 1859.
Chincoteague Island, Virginia
The taxidermy remains of the most popular pony in children's literature.
Kennett Square, Pennsylvania
These lush botanical gardens employ the most purrfect pest control force.
Philadelphia, Pennsylvania
A legendary boxing venue and ring featured in Rocky V.
Philadelphia, Pennsylvania
A rare view of a preserved Victorian science museum.
Philadelphia, Pennsylvania
This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.
Philadelphia, Pennsylvania
The humble field where the first Major League Baseball game was played.
Philadelphia, Pennsylvania
The first American axe throwing club.
Philadelphia, Pennsylvania
Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.
Philadelphia, Pennsylvania
One of Philadelphia's largest murals resides hidden under this bridge.
Philadelphia, Pennsylvania
An Irish Memorial commemorating those who perished due to potato blight.
Philadelphia, Pennsylvania
Believed to be the birthplace of the United States Marine Corps.
Philadelphia, Pennsylvania
The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.
Philadelphia, Pennsylvania
A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.