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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Dramatic river bend surrounds a natural red-rocked pedestal.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Most-visited and most-photographed slot canyon in the American Southwest.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

This quiet park's strange sedimentary spires were named after Kodak's color film.

A tunnel with windows, so you don't miss out on the impressive views.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

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

The graphite created here was used in the manufacturing of pencils.

When ecosystems collide in the arid Southwest.

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

A charming museum of natural history featuring dioramas and exhibits made entirely by college students.

This locally-famous crevasse in New York State is icy all year round.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

East meets West in this Japanese-style garden featuring plants native to Maine’s Mount Desert Island.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

This Maine bridge may be the last wire-supported bridge of its type in the world.

A brief journey through early 19th-century pioneer life across Linn County.