A real flying saucer, contracted by the U.S. Air Force.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A headstone tells the sad story of a lost little boy and his pet dog.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

An unusual college football tradition involves burying pieces of sod from competitors' turf, replete with tiny coffins and headstones.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

A relic of FDR's brief foray into utopian urban planning.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A much-maligned monument to teetotalism.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

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

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

A toxic ghost town sitting atop a massive coal fire.

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

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A monument celebrating the idea of reaching inaccessible places.

This unique historical monument features large concrete spheres designed to resemble fallen stars.