Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

Continuing the tradition of the dime museum in style.

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

Every president in history is immortalized in bronze in downtown Rapid City.

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

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

Home of the International Space Hall of Fame.

A museum dedicated to the alleged Roswell Incident.

A museum devoted entirely to the rattlesnakes and snake-related art.