Considered by many to be one of the most dangerous highways in Alaska.

The now-serene site of the largest earthquake ever recorded in North America.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

Minnesota's highest point is a scenic vista marked by a plaque and armies of mosquitoes.

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.

A library room filled with Twain’s relics, and a recovered literary treasure.

Home of the Daffodil Festival, Castle Craig, and a ghostly hound.

A giant statue perched on dumpsters watches over the freeway.

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

This Alamo Square mansion is rumored to have hosted satanic rituals and other occult practices.

San Francisco’s century-old Christmas Tree.

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

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

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The United States' first transcontinental automobile road came to its end at this spot in San Francisco's Lincoln Park.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

A sculpture in Hyannis commemorates Chief Sachem Iyannough of the Mattachiest tribe.