How many times have you been to Vegas? How many times have you visited the Hoover Dam? If the answer is anywhere from "dozens of times" to "never," you should include the Mike O'Callaghan-Pat Tillman Memorial Bridge in your Hoover Dam plans. If you've been to the Dam before, I would skip it and just do the bridge. The pedestrian overlook bridge has stunning views of the dam, and you won't have to wait in long lines to stand on the Arizona-Nevada border. There is a medallion on the bridge to indicate where the states meet. Stand there and kiss your honey, each in a different state. Enjoy the views and engineering information about this spectacular bridge that is the largest steel arch in the western hemisphere. For parties with strollers or wheel chairs, no worries. There are both stairs and a ramp, so everyone can get up there and enjoy the breezy, breathtaking sight.