The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Former villa and estate of James Deering developed to preserve native tropical forests.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

When ecosystems collide in the arid Southwest.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The second-largest giant sequoia in the world.

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

Sports history, made in the Arroyo Seco.

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

Every year, over 25,000 monarchs overwinter in Pacific Grove.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Along a California highway is a kind of Jurassic Park made of metal.

Quite simply the largest tree in the world (by volume).

The ghostly remains of an accidental sea.

San Francisco's newly reopened hands-on science museum.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.