The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The Route 66 institution that inspired Taco Bell also served as an important headquarters for Mexican-American social movements.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

One of the largest trees of its kind in California.

North America's largest accredited model railroad museum.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

One man's quest for the ultimate road trip vehicle.

The freeway that never was.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

An inconspicuous footbridge beloved by San Diego locals.

San Diego's most historic and haunted home.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

Take a leisurely ride on a 1906 cable car or a 1907 steam locomotive.

This Pringle-shaped ledge makes for the perfect photo op.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

These unusual houses look like giant boats that washed ashore on a residential street.

Sojourn to the past at this residence teeming with 1950s memorabilia.

This large collection of tiny things revels in the art of fine machinery well made.

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

The oldest home in Huntington Beach, the farmhouse is a monument to the region's pioneer past.

The lead horse on a Disneyland merry-go-round that is older than the park itself.

Inspiration struck on this seat outside the Griffith Park merry-go-round.