These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

A tree grown from astronaut seeds which were exposed to cosmic rays.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

At 130 years old and 126 feet tall, it is the largest known example of the rare Torrey pine tree.

Colorful Native American paintings are hidden within this small cavern.

California's largest steel arch bridge.

California's oldest wind harp represents a historic piece of America's Danish history.

Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.

The abandoned personal amusement park of the King of Pop.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

A hotel and restaurant serving as the mecca of kitsch.

A massive volcanic plug is now a protected area that hosts a number of bird species.

A house built from trash known as the poor man's Hearst Castle.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

Hopeless romantics will swoon over the sweet story behind this bright and colorful home.

An alley covered with 20 years of bubble gum.

A Mysterious Masonic tomb in San Luis Obispo.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

Watch the newest land on the planet form before your eyes.

This black shoreline is made up of exploded lava particles.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This unusual lava tube spouts seawater during high surf.

This sculpture pays homage to sailors that perished attempting to round Cape Horn.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.