At 890 feet over the Colorado River, it is the world’s highest concrete arch bridge and America’s second-highest, also known ...

bridges, roads, and tunnels. The winning bid was $48,890,995. President Franklin D. Rooseveltt attends and speaks at the dedication of Boulder (Hoover) Dam. Officially declaring that the dam at ...

You'll also enjoy plenty of panoramic views and photo-ops at the Hoover Dam, including at the Mike O'Callaghan-Pat Tillman Bridge. Reviewers praise the length of the tour and applaud the guides ...