Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

Whimsical artist house in the New Jersey woods.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

An emerald-green grotto just a short trip from Austin.

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

Cheap art and political theater in Vermont.

A pink cottage covered in hearts served as a haven and a resting place for LGBTQ activists.

A white oak with property rights.

A museum dedicated to the alleged Roswell Incident.

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

Enormous lake at the bottom of a unique cave system.

Mile-long cave system near Great Smoky Mountains.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Cavernous opening completely encased in Karst limestone.

A popular swimming hole that hides one of America's most deadly diving spots.

A grove of colossal man-made flowers built to collect the sun's rays.

Natural time capsule containing an alien ecosystem.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

This dramatic sea spire is home to the world's rarest insect and is part of the lost continent of Zealandia.

A museum celebrating the Victorian obsession with hair art.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.