M.B.
There are lots of "adventure" kinds of things you can do in/around Las Vegas......
http://www.vegasdaze.com/listing.aspx?c=29&n=Sky+High...
This talks about a zipline ride through Bootleg Canyon, indoor skydiving, and other things...
Here's another link of adventure stuff...
http://blog.vtravelled.com/las-vegas-adventure-activities...
There's tons of stuff to do... just depends on what you are looking for!
Hey.. at Excalibur, if you go in at the right time, you can get photos with two really hunky guys!