One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

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

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

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

A beautiful geyser under environmental threat.

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

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

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

This South Carolina water tower is an icon of the city of Walterboro, but it also once served as the county jail.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

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

This is one really big nut.

When ecosystems collide in the arid Southwest.

The Cadillac Ranch for monster truck aficionados.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

It took more than 20 years and a sharp eye for one man to assemble this quirky collection.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.