When we arrived at Hoover Dam, we parked our car in the parking lot of the tourist center ($10/unlimited time), took enough drinking water and walked to the top of the dam (the temperature was as high as 40 degrees Celsius on that day, it was very important to replenish water). The radial gate was quite powerful to watch from high to low. Not far away, Highway 93 crossed the mountain, and its bridge became the perfect background of the dam. Large diversion tunnels and large power grid towers form a magnificent picture. The top of the dam is a two-lane road. We are happy to walk right and left. We have a panoramic view of Lake Mide and the dam. Then we take the elevator down to the viewing platform. After security check, we know that it is a toll-paying attraction. In fact, it is the difference between far and near. USD10 yuan/person feels worthless and goes back to the top of the dam.