Just got back from Las Vegas earlier today. Some pictures for
your consideration:

On the way to Hoover Dam:


The water intake towers on the Nevada side of the dam:

Lake Mead, viewed from the top of the dam. Note the drastic drop
in the water level of the lake in recent years:

A view of the hydroelectric power station at the foot of the
dam:

The face of the dam itself. Yes, it's one heckuva drop from the
top:

The Colorado River leading away from the foot of the dam. The
bridge under construction is intended to ease the flow of traffic
going over the top of the dam:

More pictures to follow...