A tourist attraction founded around a slumping cabin.

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.

The magic's in the hole!

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The restored and active Victorian-era final resting place of San Francisco.

San Francisco's newly reopened hands-on science museum.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

When ecosystems collide in the arid Southwest.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The largest source of fossilized insects anywhere.

Home to the deepest rift anywhere on Earth.

The only road through the heart of Glacier National Park.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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.

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

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

The first declared National Monument in the United States.