The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

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

A vertically floating hemlock controls the waves and weather at Crater Lake.

Only known mainland rookery of the threatened Stellar sea lion.

A volcanic fissure over two miles long and up to 70 feet deep.

A volcanic landmark located on an Ice age lake bed.

This large maar crater in Oregon is the bigger brother to Hole in the Ground.

Massive crater in central Oregon.

On the Oregon coast is a natural hole that seems to be draining the sea.

The longest continuous lava tube in Oregon.

Bridges, terraces, and replicas of historic structures all built of rock and petrified wood by one man.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

The largest wooden building in the world now houses a fascinating collection of aircraft.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Two massive rock outcroppings on the Oregon coastline.

Portlandia is the second-largest copper repoussé statue in the United States.