Check out the cliffs(West End) for sure. I would suggest you set some time aside to catch a sunset one night at one of the restaurants. I would recommend Ivan's at Catcha Falling Star. As a non guest you cannot enter the property till 5PM, so keep this in mind. Also, call ahead and make a reservation and ask them for the free pick up. They will send a driver to get you at the Riu and than you are responsible for the ride back. Ivan's is just down the street from Rick's, it's actually 2 properties before you get to Rick's. You could scope out Rick's and than make your way to Ivan's to catch the sunset if you get your own ride up there.