A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

The highest bridge in America was built for an almost unnervingly small amount of money.

A beautiful oddities shop crammed with strange and morbid curiosities.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This woodland architectural installation acts as a camera obscura for the heavens.

A reproduction of earth's many biomes.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

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

An enormous park-like oasis, full of famous Chicagoans' graves.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A colorful architectural gem in Seattle's uniquely modern Central Library.

Rustic natural hot springs in the deciduous rain forest.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Private collection of art inspired by cabinets of curiosity.

A clear blue swimming hole with hidden caves, still unexplored.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Quite simply the largest tree in the world (by volume).

A house filled to the brim with oddities and curiosities.

The trials and tribulations of marking Poe's grave.

The second oldest continuously operating bar in Louisiana.

Nikola Tesla's former home contains an homage hidden from plain sight.

An antiquated German apothecary on Chicago's North Side.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.