Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

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

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

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

A haunting tribute to pioneering photographer Clover Adams.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

This grand gothic brewery has been pumping out suds for over a hundred years.

A tiny piece of the Moon is embedded in this stained glass masterpiece.