This impressive tunnel was dug entirely by hand over the course of 36 years.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Handmade treasures from around the world.

A unique market that brings together various goods and cultures.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

A sculpture dedicated to Napa Valley's oldest mineral water company.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A trash dump made beautiful by nature's power.

A celebration of once forgotten materials.

Every Sunday, this Thai temple in Berkeley serves a backyard brunch.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

The black lab that was voted mayor of a California town is forever remembered by a life-size statue.

A gap in the concrete has been transformed into a miniature playground for the mind.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

A 1920s speakeasy that had rum runners racing up and down the shores of California.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

California's own majestic geyser is powered by a subterranean volcano.

The southernmost outpost of the Russian Empire in colonial America.

Massive prehistoric mammals used these stones as oversized scratching posts.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."