One of the largest trees of its kind in California.

North America's largest accredited model railroad museum.

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.

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

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

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

Sports history, made in the Arroyo Seco.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

Thousands of turbines whir at at the origin of North American wind power.

One of Hollywood’s favorite government buildings.

A second generation sun-powered marvel lights up the night.

This subtle Berkeley paving stone actually marks off a lawless tube of air that extends into space.

Seven ceramic sculptures are scattered around this California college campus.

One of the world's longest murals depicts the history of diversity in Los Angeles.

A bigger-than-life pun that has become a beacon of altruism.

Ingenious bakery opens up the first Cupcake ATM at their flagship location in Beverly Hills.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

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

Towering basalt columns, a creation of fire and ice.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?