Impressive and beautiful view. Cool how you go from Nevada & Arizona with just one step, and they have clocks showing the time of both states. I know, something so simple but all tourist like it.
Hoover Dam is a great spot for pictures and to spend some time out, specially if you're lucky, like us, to have a beautiful cool sunny day.
We got the Power Plant tour for $11, personally I don't think it was worth our money but at least one in our group enjoyed it.