Las Monorail Special Day rate
Unlimited One-Day Pass for only $9, usually $15.
Good for unlimited travel for one person for a consecutive 24-hour period during operational hours. The 24-hour clock begins, and the expiration date and time are stamped, with first use at the fare gates.
Order at http://www.LVMonorail.com/
I am not sure how long this special is going to last, so take advantage while you can.