Book our half-day express tour to the Hoover Dam from Las Vegas. Experience breathtaking views of Lake Mead, Hoover Dam and the amazing Pat Tillman and Mike O’Callaghan bypass bridge. Don't be duped by other tour companies who add fees at check-out book with confidence knowing you're getting the best deal. Book with a brand you can trust Gray Line, the world-famous Blue Diamond. By choosing Gray Line you ensure that you have the best of the best at your service.