A must see!! Tour was great. Only problem was apparently everyone decided to travel to the Grand Canyon on this day. Record crowds!! Hoover Dam (short visit; 10 min) was awesome. Everything was organized; there were long lines, but worth wait. There are security checks and you can't take phone or camera onto skywalk. They have professional photogaphers who do a great job of posing and snapping photos for you to buy. Be aware, bathrooms are not plentiful on the way to the Canyon use the tour bus facilities or wait till you get to the Canyon, esp females. The food at the Guano site as well as the view was the best!! Our Bus driver, Gene was an excellent source of info; wish we did tour at beggining of Vegas trip instead of end, cause he gave us great tips and info that we will use if back in Vegas again