This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

Towering basalt columns, a creation of fire and ice.

A natural dome made of volcanic glass in Inyo National Forest.

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

This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.

California's oldest existing theater building hosted an impressive cast of celebrities, including hosting Mark Twain's first lecture.

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.

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

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

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

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

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

Canyon walls shrouded in ferns.

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

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

A crumbling cliffside ruin hidden in the woods.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

This country market harbors goats on its roof.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

The oldest lawn bowling club in the United States.