Treehouse motel and treehouse-building school.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

These aggressively sustainable art homes look like something out of 1970's science fiction.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

An homage to everyone's favorite prehistoric cartoon family.

The final resting place for the remains of 143 Habsburg royalty.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

When ecosystems collide in the arid Southwest.

One man's ambition created this psychedelic log home.

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

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

Historic funicular railway, believed to be the shortest railroad in the world.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A mechanized clock where a man fights off a dragon, crab, and rooster.

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

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

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

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.