Ruins of a German castle on top of a towering stone pillar.

An alley covered with 20 years of bubble gum.

Commonly referred to as the most photographed Victorian home in the United States.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

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

This massive redwood tree has a hole in the base big enough to drive through.

Canyon walls shrouded in ferns.

Seven ceramic sculptures are scattered around this California college campus.

A trash dump made beautiful by nature's power.

Golden Gate Park's historic collection of plants.

Outsider art or homage to aliens?

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

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

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

This giant shopping mall still holds signs of its automotive past.

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

This graffiti-covered bridge is the quintessential vision of a place for disillusioned youth to escape the complexities of burgeoning adulthood.

'Cause the fence start shaking, the earth was quaking.

Special tunnels built so that frogs won't be killed when crossing the highway.

Macabre astrological automaton clock dating to the late 1400s.

Go surfing on this urban wave, "hacked" by local surfers.

The "Prussian Versailles" that is as glorious today as when it was built.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.