A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

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

A beautiful geyser under environmental threat.

An architect's childhood fantasy treehouse made real.

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

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

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

The world's tallest statue of an American hero.

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

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

Only known mainland rookery of the threatened Stellar sea lion.

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

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

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

A massive sea stack famous for its appearance in The Goonies.

Two massive rock outcroppings on the Oregon coastline.

This now-abandoned part of the original transcontinental railroad route provides a surreal driving and historical experience.

Dozens of rockets and missiles are on display outside a testing facility in the Utah desert.

The largest island on the great salt lake is home to curious creatures and strange stories.

The natural history of Utah is on full display inside this museum.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

The fifth-longest natural arch in the world, and the longest outside China.