Was hoping for the nice looking cactus not the stringy yucky ones. I'm a rock fan so hoping for cool rock formations. Haven't been to Nevada yet.
Yes we have nice cactus and bristlecone pine, Sandstone, granite and good visitors centers at the various locations with a hour of the Las Vegas proper.
I was born here some 70 years ago and other that my time in the service have lived in Clark Country my whole life. We have an excellent Library at UNLV; world class geology at Red Rock Canyon National Conservation Area; good snow skiing at Lee Canyon in the winter and water skiing at Lake Mead National Recreation Area. We have parks, churches and a whole society that has little to do with gamming; Last time I went to a show on the Las Vegas Strip was 1964 after my senior prom when I went and to a show with my date.
There is a over thrust belt in the Red Rocks; if you root you can find all the layers of you get if you hike down into Grand Canyon withing 20 miles of downtown Las Vegas. To me petroglyphs and Pictographs are fun things but the summer is not the best time for hiking.
Mob Museum is interesting - it is downtown in the old Las Vegas Post Office in the Summer.
Hoover Dam and taking the tour down into the bowels of the dam is well worth the drive anytime during the year as long as you have A/C in your car; stop at the Alan Bible Visitor Center on your way to or from the Dam.
Valley of Fire is best seen in Spring when wild flowers adorn the landscape.
Bagging Charleston Peak at 11, 916 feet is a good summer hike.
If you have a day then renting a car and driving to Zion is great.
There are so more non-gaming things to do but your interests can be found; The Springs Preserve can show you how the valley looked 170 years ago and why it is called Las Vegas.