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

The fading, forgotten remains of a once bright and booming factory.

Megachurch turned Catholic church comprised of 10,000 glass panes.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

These free-roaming horses were once destined to disappear from the land.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

This comprehensive collection features Native American artifacts dating back centuries.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

Semi-recognized center of the world, with many oddities.

The state bird of New Mexico, constructed entirely out of garbage.

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

This memorial includes fragments from one of the greatest tragedies in United States history.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

A scrap-metal sculpture recalls an infamous 19th-century camel.

A mysterious "wedding cake" castle in the middle of the urban desert.

This is one really big nut.

An urban laboratory.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

Ancient pueblos built into the base of a natural canyon wall.

A Wild West jailhouse that slid down the mountainside.