Hoover Dam & Hoover Dam Bridge
It stands like a sentinel, watching in the wind over one of America's most treasured landmarks, the Hoover Dam.
When the Mike O'Callaghan-Pat Tillman Memorial Bridge opens to traffic later this week, it is expected to become an instant tourist attraction while providing a quicker, safer drive between Phoenix and Las Vegas. Ref. Source 5
There is enough concrete in the Hoover Dam to pave a two lane highway from San Francisco to New York.