If you have a car, Red Rock is a great place to drive and then do some hiking/rock climbing…and about a mile or so further down the road is a ranch with a “ghost town” cowboy show (entry fee) and a small “zoo” with local animals (wolves, deer, buffalo, etc.) that is free (donations requested).
Mt. Charleston is about 45 minute drive, currently has lots of snow - it is really pretty up there, with a few nice lodge/restaurants with a great view of the mountains.
If you want to see the casinos where the “locals” go, the absolute best is Green Valley Ranch (about a 10 minute drive from the Strip on the I-215 going East). Very nicely done, great restaurants and, next to the Paris buffet, one of the best buffets in town. Also has the Whisky Sky bar that attracts a lot of celebrities who don’t want to be seen on the Strip.
Belz Mall is south on Las Vegas Blvd, about a mile or so south of Mandalay Bay - it is an outlet store with some great deals on almost everything - also a decent food court, so you can spend a lot of time there. Next to it is a restaurant called “Bootlegger” that is a secret LV tip - starting at 10:00 they have live entertainment and you wouldn’t believe who shows up! Lots of “old stars” who live here go there and sing a tune, some famous people visiting in town sometimes show up and perform…
On the strip, a fun “freebie” is the car museum at the Imperial Palace (they hand out tickets everywhere, and also are in the magazines in every hotel room). It has an amazing collection of classic cars and odd cars.
Another fun thing to do is the model home tours…you just drive around any neighborhood 4 miles or more from the Strip, see signs leading you to model homes (all over this city, in every direction) and then you just go in and check them out…usually 4-8 models to look at, all furnished by decorators. No need to buy…but fun to look at. Believe it or not, even with people who have new homes here, it is a popular “hobby” to check out what they are building and how prices are going. A lot of people from large urban areas are usually shocked by the quality and value (hence the 3000-4000 people who move to Las Vegas every month).
There are also some great parks, lots and lots of golf courses, you can go horseback riding, rent all terrain vehicles, take flights over Grand Canyon…I don’t think you have to worry about being bored. If you are anything like me, before I moved here I always had a list of things I wanted to do when I visited - and on the way home I realized I only did about 1/3 of what I wanted to do…time just seems to have flown by.
Have a great trip!