An overlooked memorial honoring the local Washington residents who died in World War I.

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

Sports history, made in the Arroyo Seco.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This 19th century train workshop is a treasure trove of railroad history.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

A desert ghost town—occupied for only 12 years—was once home to more than 500 silver mines.

The ghostly remains of an accidental sea.

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

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A battle between nature and architecture in the Cambodian jungle.

Starship-temple contains 400 tons of drinking water and offers free Japanese lessons.

Go through the looking glass in Tokyo's Wonderland-themed shop.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Vietnam's feral abandoned water park offers access to a post-apocalyptic funscape, now with fewer crocodiles.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.