I highly recommend a visit to the top of the Eiffel Tower. It is not exactly cheap but it is worth the visit to see the Strip from above. Every couple of years, I go up to see how the Strip has changed. You get a better view of the hotels lit up at night then at the Stratosphere. Near closing time on a slow night (during the week) is one of the better times to go. I like watching the Bellagio water show from up here.