Aw man. I should have gone to the Star Trek experience when I was there a couple of months ago.
You can see the Lions at MGM, and then check out the facade of New York New York across the street, which if you are familiar with NY is kind of neat. If you like roller coaster the one inside of NY NY is supposed to be good, but I have not been on it. Also at MGM we had a lot of fun at Studio 54, the music was perfect for us, we are in our early 40’s, love to dance, and were very into dance clubs when we were young. If you want something more she she I think Tao is the hottest spot. Also in MGM there is a very good chinese/Japanese restaurant right near/on the casino floor.
I liked the shopping inside of Caesars best. I saw Seinfeld at caesars when I was there, he was very funny; not sure if he is still playing. By the way RAO at Caesars, an Italian restaurant is fantastic if you like southern Italian. Service was excellent.
Someone told me there is some sort of car museum that I missed that is very good also, I guess you could google it if you are interested in cars.
The conservatory in Bellagio is nice to walk through, and the Venetian is kind of neat to experience. The shopping level has people on gondola’s like Venice.
The new Elvis Cirque is opening, or might have opened already at Aria.
Valley of fire is good to visit if you are into natural beauty, as someone suggested above. It is like being on another planet.
I really enjoyed the Hoover Damn, traffic getting to the Damn is a bitch, be aware, but once there we did not have to stand in line for more than 5 minutes.