The oldest standing structure in downtown San Diego.

Drink a Guinness under the wings of Reagan's retired Air Force One in his presidential library.

Sports history, made in the Arroyo Seco.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

The famous blue house from the classic horror film "Halloween" is now a local landmark.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

An inconspicuous suburban street corner is the site of San Diego's worst air disaster.

This 19th century train workshop is a treasure trove of railroad history.

It would be a crime to miss it.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

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

This giant temperature attraction created some giant electric bills.

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

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

A stellar example of Art & Crafts architecture, and a movie set to boot.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

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

The Giant Lemon of Lemon Grove.

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

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

Honoring the famed folktale author, this California museum looks like it belongs in the Black Forest.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A master of deception, Harry Houdini's greatest trick may have been living in two places at once.