The beauty of urban decay, hiding some dark secrets.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

This grand mansion has starred in everything from Bones to Buffy.

One man's ambition created this psychedelic log home.

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

The ghost town that ended up on Ebay.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

A ghost town at the airport is now a refuge for blue butterflies.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Visible below the waves are memorials to the city's Gold Rush dead.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

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

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

The angel of death appears to weep black tears at this grave marker.

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

An acoustic anomaly with a mysterious cause.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The world's longest known cave system.

A modernist landscape of water and sci-fi concrete.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.