A gap in the concrete has been transformed into a miniature playground for the mind.

A unique piece of graffiti offers a little slice of local history and mystery.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

Neoclassical Revival mansion and set of horror cult classic Phantasm.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

Spiral labyrinth hidden in the hills above Oakland, CA.

The ruins of the suspension bridge hang over Kingsbury Run as a ghost of racial prejudice.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.

Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

A Barbados crypt where it's said that the coffins refuse to stay put.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

An emerald-green grotto just a short trip from Austin.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.