The abandoned personal amusement park of the King of Pop.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

An eclectic trailer park retreat in the middle of the California desert.

This massive redwood tree has a hole in the base big enough to drive through.

Abandoned bridge hidden deep in the San Gabriel Mountains.

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

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

Its buzzing collection honors vibrator history.

Towering basalt columns, a creation of fire and ice.

The ghostly remains of an accidental sea.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A cave's rare beauty held a cavernous secret hidden underground.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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