
Hoover Dam curves across Black Canyon on the Nevada–Arizona line — guided powerplant tours descend 500 feet into the generator hall, the top visitor center explains the Depression-era build, and the Mike O'Callaghan–Pat Tillman Memorial Bridge next door gives the free panoramic overlook. Lake Mead's bathtub-ring shoreline spreads below.
Guided tours run about $30; the bridge overlook and exterior viewpoints are free.
About 45 minutes southeast near Boulder City.
Yes — dedicated coach parking at the dam visitor center; bridge lot is a short walk.