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

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A tourist attraction founded around a slumping cabin.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Visitors to this public park will also find the ruins of an old western fort.

Four hundred granite steps were built into this massive rock by the National Park Service.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

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

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.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

The highest bridge in America was built for an almost unnervingly small amount of money.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The largest self-built castle in the U.S., six decades in the making.

A reproduction of earth's many biomes.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

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

Giant telescope mirrors built in a spinning furnace under a college football stadium.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

The world's largest piece of copyrighted artwork.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

A centuries-old church stands as a testament to Boston's "father of architecture."