A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This serene oasis in an affluent Los Angeles neighborhood holds some of Gandhi's ashes and got Elvis into Eastern Philosophy.

A beautiful oddities shop crammed with strange and morbid curiosities.

A reproduction of earth's many biomes.

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

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

A bizarre roadside attraction and the first instance of miniature golf in the world.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The longest navigable underground river in the United States is home to countless blind and albino animals.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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

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

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

Oregon's unexpected high desert, displaying layers of time in a colorful show.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

Rustic natural hot springs in the deciduous rain forest.

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

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

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

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

European castle ruins in an American state park are actually the product of death and grief.

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