The remains of a ruined mansion memorialize the 1906 earthquake.

Rainbow-hued local gem in Venice.

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

This glamorous old building is said to have inspired the Tower of Terror.

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

The largest drain hole in the world.

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

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

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

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

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

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

Resting place of Hollywood's immortals is also site of summer film screenings.

A trash dump made beautiful by nature's power.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

Tubing through a cave lit with glowworms is a magical underground experience.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

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

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

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

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.