The flow from this waterfall sometimes comes out of springs below its rim.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

The victims of a free-floating Japanese bombing during WWII are remembered by this stone monument.

A volcanic fissure over two miles long and up to 70 feet deep.

The original span of a high bridge across the deep Crooked River Gorge has been preserved for pedestrian use.

The world's last remaining store of its kind.

Atop an active stratovolcano, two lakes separated by a narrow strip of land.

A volcanic landmark located on an Ice age lake bed.

Massive crater in central Oregon.

Eat like a "buckaroo" at this remote restaurant.

This abandoned motel doesn't welcome guests anymore, but decay and a creepy atmosphere still call it home.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This little museum has an exhibit devoted to the elusive forest denizens.

A Tibetan Temple and Buddhist organization just off the beaten path in Northern California.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

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

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

A hidden subterranean installation offers a view of the sky.

Art in the form of a winding, man made crack in stone.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

San Francisco's first World's Fair, dedicated to the wonders of California.

A century and a half of research in the sciences and natural history, still going strong.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.