Crumbling ruins mark the site of a couple's grisly murder in the woods.

This overgrown Illinois water park offers a whole new type of adventure.

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

Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

No one really knows how these old hobby horses got here, but the herd keeps growing.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

The tragic reality of a town riddled with rumors of haunts, chemical spills, and serial killers.

Jacksonville's highways rendered this century-old grammar school unusable.

On a dusty county road sit the ruins of a ghost town's abandoned church.

The abandoned bathhouse is all that remains of the hot springs considered Florida's original tourist attraction.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

A mysteriously abandoned campsite in San Angelo State Park.

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

An unrealized Taoist palace left abandoned in a Houston suburb.

It's clear this abandoned Art Deco gem was no ordinary cleaners.

Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

A former hospital is now home to a pizza parlor and maybe a few ghosts.

An abandoned underground bunker not far from downtown New Orleans.

This small, hidden cove is home to abandoned boats.