The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The only surviving prototype for Buckminster Fuller's house of the future.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Diego Rivera's massive tiled fountain and failed infrastructure project.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

A church dedicated to the Mexican skeleton saint.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.

This structure among the trees was the result of divine inspiration.

This lovely university observatory continues to sit abandoned since its potential savior was sent to jail for fraud.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A haunting, yet lovingly hand-hewn potters' field full of graves that flood with each heavy rain.

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