This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

FDR's Art Deco hospital tower was hopelessly inefficient.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

This working class sculpture pounds his hammer all the livelong day.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Military and first responders can test their skills in a Foggy Bottom mock station down in Georgia.

There is one corporation registered for every three square feet of space in this inconspicuous office building.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

A giant light 13 feet high shines near Thomas Edison's old Menlo Park lab.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

Dozens of lights dangle from the branches of what may be the brightest tree in Los Angeles.

A common entry point to the Griffith Observatory trail holds its own wonders.

A shining, cold, black organ lies in San Francisco's financial district.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Of all the origin stories for weed's secret code, this one likely has the goods.