An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

The ghost town that ended up on Ebay.

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

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

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

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

This natural wonder drops 16 stories straight down through rare flora and streaming waterfalls.

See massive fossils that are over 200 million years old in northeastern Arizona.

This charmingly homemade amusement park has been growing for 40 years.

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

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

The intriguing personal collection of a professional demon-chaser.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Couple's personal collection of pinball machines turned public pinball museum.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

The "Seinfeld" diner.