A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

This former coal gasification plant found a curious second life as a popular public park.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

The world-record holder for the longest bridge stretching continuously over water.

This strange, small castle on the bayou has withstood the test of time and weather.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

The crumbling remains of a 19th century fortess.

Rows of 19th-century brick ovens used to process coal into coke form the center of a wooded park.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A crumbling hospital from the 1850s on Roosevelt Island.

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

Moonbows over Kentucky.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A tunnel with windows, so you don't miss out on the impressive views.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

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

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

The decaying adobe remains of an old homestead are just off the beaten path in Joshua Tree National Park.

Version of the French Riviera destroyed by the sea.

The ghostly remains of an accidental sea.