Admittedly, it's a bit "pricey", but hot dayummm what a kick-ass adrenaline rush to zoom around in a Lambo, Ferrari or McClaren.   I actually got to drive that little ditty in the picture on the Strip with a lovely lady who was also quite skilled behind the wheel.  Oh, yea.....the sex afterwards was the "furious" part!!

Lovely at night, now that the colored lights are on.
I love the way Vegas continues to evolve!
 

May not be as exciting and sexy as some other ideas, but if you're entertaining a nerd kind of a guy he might find it interesting.  

the trainers are out at the pool a lot and the dolphins come right near to the side of the pool. You can sit out there all day if you want. I thinks it;s about $14 for adult entrance fee.