This remarkably simple jail went over a century without an escape.

The oldest continuously operating church in California.

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

This eagle-topped spire remembers the military commander who snatched up California for the United States.

Fake rail crossings mark the site of an influential doctor's demise.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

Haunting and beautiful trees, doomed to die.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The arch that celebrated the completion of the Lincoln and Victory highways.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The only surviving prototype of Buckminster Fuller's revolutionary car.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

Experience a charming 1930s version of "infotainment."

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

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

A statue high in a hill that represents how Buffalo Bill got his name.

Lone survivor from Custer's Last Stand forever preserved.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

A museum where visitors can learn about greyhounds and (more importantly) pet them.

A cannon designed to fire an atomic warhead.