This massive blockhead sculpture hides an entire library.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

This ancient theater was once the home of fierce gladiatorial battles.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

A large circus museum with summer performances.

A preserved stretch of ancient fossilized trees with an impressive gem collection to boot.

This black shoreline is made up of exploded lava particles.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

One of the oldest continuously operating amusement parks in the U.S. is an open-air museum of Art Deco and neon lights.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A multiversal transit station located right below a highway interchange.

Take a dip in the world's largest mineral hot springs pool.

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

The only Bahá'í house of worship in North America and one of only a handful worldwide.

First planned industrial community in the United States.

This massive roadside mascot was the first version of the giant to illustrate his butt.

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

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

The Bong-area park police have asked visitors to please, stop stealing the signs.

Wisconsin's most celebrated export gets the royal treatment on I-94.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

One of the oldest and tallest lighthouses still in service on Lake Michigan.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.