A brass plaque dedicated to a convicted cannibal hangs in the National Press Club, and that's not even the craziest part of the story.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Go take a picture with the inventor of the daguerreotype photographic process.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

There’s a hidden military meme engraved on the World War II Memorial.

Four bald cypress trees in Lafayette Square, across from the White House, mark the southern edge of a 100,000 year old cypress swamp.

The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

People escaping slavery may have hidden inside a corpse vault.

A haunting tribute to pioneering photographer Clover Adams.

A nostalgic bibliographic gem.

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.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

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

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

Ship skeletons haunt Baltimore's waterways.

Once America's tallest structure, now a Baltimore landmark.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

The trials and tribulations of marking Poe's grave.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

Submerged lava formations create incredible waterworks.