World's largest collection of serial killer artwork and other macabre exhibits.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

The world's largest banyan tree is followed by a community of worshippers.

A collection of odd-shaped and quirky sounding instruments handmade by a midcentury inventor-composer.

More than 200 unconventional musical instruments that anyone can play.

One of the ghostly stops along Route 66.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

America's only nuclear missile silo open to the public.

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

Shop of curiosities with a dinosaur museum tucked in its basement.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

The final resting place of a space program monolith.

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

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A Jenga-style cylindrical tower of books that appears to go on forever.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

The hallucinogenic center of the ancient world.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.