World's largest collection of serial killer artwork and other macabre exhibits.

Gouged in the mountain to make stage coach access easier through the Fremont Pass.

This park is home to California's first oil boomtown, with structures that have stood for more than a century.

The second-largest giant sequoia in the world.

This hidden fire lookout offers spectacular views of Sequoia National Park.

This massive statue of John Muir on the side of a California highway was carved from a redwood tree.

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

A 19th-century cabin built into a hollowed-out Sequoia tree.

This small shack near the entrance to Sequoia National Park has been in almost continuous operation for the last century.

Four hundred granite steps were built into this massive rock by the National Park Service.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Where decommissioned airplanes and helicopters go to become part of Hollywood.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.