Oldest building in California still in use.

An enormous illuminated figure dances on the Las Vegas strip.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Experience a charming 1930s version of "infotainment."

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The unusual patterns in this rock formation result from two distinct modes of weathering.

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

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

This Moab institution functions as both a rock store and a small natural history museum.

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

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

This spectacular track has run continuously since 1882.

Inside this striking glass building, visitors can see thousands of dinosaur fossils in the positions that nature deposited them more than 150 million years ago.

This UFO landing strip was created by a charitable Wyoming city that was worried about residents of Jupiter.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Largest collection of mounted dinosaur specimens in the world.

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

A clear example of the process of erosion in action.