If it's super hot outside, head to this museum for a few hours in the afternoon!
Took us about 3.5 hrs to go through the 3 floors with the audio tour, and we still didn't finish it all!
Definitely one of the best museums to learn about Las Vegas and it's beginnings, history, famous gangsters.
Tip:
It takes 4.5 hrs to finish the whole museum, if you do the whole audio tour and take your time.