One thing I like to do, especially for a first trip, is see Red Rock Canyon Park, just outside of Las Vegas -- can be a short quick trip. Good idea to rent a car. A circular road takes you through the heart of it. Marked parking areas just off the main road and short hiking trails. Visitors center.

"Red Rock Canyon, just 15 miles west of Las Vegas, presents awe-inspiring views most wouldn't expect to see near a major metropolitan city. in contrast to the bright lights and hype of the Strip, Red Rock offers desert beauty, towering red cliffs and abundant wildlife. "

http://www.vegas.com/attractions/outside_lasvegas/redrock.html

Robert