Only water is allowed inside the buildings at Hoover Dam. How to dress for the Hoover Dam Tour? When visiting the Hoover Dam, it's best to dress comfortably and appropriately for the weather.

Both on-site guided tours include stops inside the power plant, but only the Hoover Dam Tour offers a look at the facility's inspection tunnels. If you'd like to take a power plant tour ...

Inside a tunnel on the Hoover Dam tour.Credit: Travel Nevada There are also ventilation tunnels and, on the way to the Arizona border in the middle of the dam, we’re allowed to venture down one.

Read on to discover the best Hoover Dam tours from Las Vegas. Price: Adults from $90; kids from $80 Duration: 7 hours Guides double as stand-up comedians on this Hoover Dam bus tour. In addition ...