Nine limestone rock stacks on Australia's "Shipwreck Coast."

Alien rock formations grown from the sands of an Australian national park.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Historic funicular railway, believed to be the shortest railroad in the world.

The legendary building that needed ghostly approval before being built.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

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

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

The ghostly remains of an accidental sea.

Oldest building in California still in use.

A 19th-century Baja cantina that many say is the birthplace of the margarita.

This historic tower in the California desert promises visitors a "vortex of good vibes".

Catch a glimpse of the elusive Peninsular bighorns right off of the desert freeway.

A world-class observatory in the California desert.

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

The Giant Lemon of Lemon Grove.

San Diego's most historic and haunted home.

North America's largest accredited model railroad museum.

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

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

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

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