The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

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

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

Seattle's own bad art museum located inside Cafe Racer.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Seattle’s Whimsical Mural Master.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

Abandoned power station once home to a squatter community, now being developed into an arts center.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

Like something out of a pulp adventure, this abandoned plane wreck is slowly being retaken by the Caribbean jungle.

Outsider art meets paleontology at this roadside reptile repository.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

The labyrinthine storm tunnels beneath the city of Melbourne are ruled by a band of urban explorers.

A dwindling menagerie of anthropomorphic oil derrick animals still dot the barren California landscape.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

A cave interior in the shape of the ancient rhinoceros, created by lava cooling around its carcass.

A 200-year-old collection of medical paraphernalia in a historic house.

The trials and tribulations of marking Poe's grave.