Russian history in San Francisco.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The liveliest ghost town in the state.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

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

Explore 10 acres of environmental sculptures.

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

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

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

Towering basalt columns, a creation of fire and ice.

The ghostly remains of an accidental sea.

This natural marble cave is one of only five national monuments in Oregon.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

This impressively large collection includes crackers shaped like Jimmy Carter, Mickey Mouse, and more.

Site of the greatest known waterfall that ever existed.

This dilapidated ship carcass covered in trees is a striking sight.

The highest point in Washington state is a volcano covered in glaciers.

This oddity shop contains everything from antique tools to a human skeleton.

The mayor made the declaration in 2004.

A wild west land agreement was etched right onto this historic Idaho stone.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

One of the last socialist halls still standing in the United States.

A sprawling museum located on the former site of the Orphan Girl Mine.