An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

A large, historic railroad trestle over the Columbia River is now open for non-motorized traffic.

The sail of the first nuclear sub to circumnavigate the world.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

Nuclear reactor created the plutonium used on Nagasaki.

This ancient structure is widely thought to be the oldest intact pyramid in the world.

A preserved oasis with traditional Andalusian-style architecture and beautiful views of the Nile.

In Egypt's expanding metro area, many of the neighbors are dead.

This Seattle museum displays the history of the telephone through an impressive collection of telecom equipment.

A frozen relic of Seattle's hydroelectric boom is now a teaching facility for future engineers.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A home made entirely from scrapped, reclaimed and recycled material in Whitman County, Washington.

An obscure waterfall that looks like something out of a fantasy novel.

A graveyard for early settlers, sometimes called Old Pioneer Cemetery, hidden in the woods on a hillside.

A nearly abandoned 19th-century town on the Palouse.

A town's monument to a touch-football victory 50 years in the making.

An abandoned 19th-century hospital now swirling in ghost stories.

The former home of the "Mother of Father's Day."

A 14-foot-tall Bigfoot statue stands guard over this café and filming location.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

The site of the Wellington avalanche, one of the America's worst railroad disasters.

A monument tucked within a suburban neighborhood commemorates the first nonstop flight across the Pacific Ocean.

An enormous boulder deposited by the Scabland floods lies in the Quincy Basin among a host of smaller boulders.