Road signs in Namibia mark the location of one of the five major circles of latitude.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

Clean, cold drinking water flows from a nondescript pipe in a roadside rock face.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

This modest marker near Notre Dame identifies the very center of Paris.

The famous winding walk at Chartres is surrounded in mystery and myth.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A historic arena where the Beatles played their first concert in the U.S.

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

It was once the base for a series of domestic terror attacks.

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

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

A moving memorial to the fallen and missing from WWI trenches.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Breathtaking and huge 430 year old maps of Italy.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This isthmus in the Bahamas narrowly separates the roiling Atlantic from the cool Bight of Eleuthera.

A larger-than-life statue of America's favorite sundae marks the place it was invented.