A once grand hotel is being retaken by the wilderness it once capitalized on.

Town of spiritualists and mediums in Florida.

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

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

The largest drain hole in the world.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Visit this playground of waterfalls, caves and sinkholes.

The largest permanent Monopoly board makes one of the longest games even bigger.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

A science teacher's dream.

A picture-perfect town, perfect for blowing up.

A hollow cement depiction of time's inexorable effect on the human body.

The subtle science of a master molecular gastronomist.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

A castle built by an eccentric medieval enthusiast in rural Ohio.

European castle ruins in an American state park are actually the product of death and grief.

An abandoned relic of the city's failed experiment with below ground transit.

An antiquated German apothecary on Chicago's North Side.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.