The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

One of the largest trees of its kind in California.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

The blinking light atop the iconic landmark has been sending secret messages for decades.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

If you are looking for a used Russian battery, Chinese Ham Radio or other electronic oddities this Flea Market is a good place to start.

The former Naval shipyard is open for exploring - mostly.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

California's own majestic geyser is powered by a subterranean volcano.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

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).

San Francisco's newly reopened hands-on science museum.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The world's largest military aircraft cemetery.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

America's only nuclear missile silo open to the public.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The site of Neil Armstrong's first flight is marked by a full on replica of the moon landers.

The largest earthwork effigy in the world.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

Home to the deepest rift anywhere on Earth.

A historic blockhouse and trading post give a glimpse into the early colonial history of South Carolina.