Illuminati symbolism at Hoover Dam

When JM and I went to Hoover Dam last week, we really were not prepared for the amount of symbolism that this place conveyed. There were messages all over the place! I am not going to assume what it all means, but it is a bit unnerving. Upon exit of the visitors area, you are greeted by two massive statues and artwork depicting the universe. While you are perusing the artwork and information on the star systems, there is a voice in the background telling you that the whole thing was built in hope that the aliens would come down from the sky and be able to locate the Hoover Dam. WTF? Here are some pictures.

Here are photos of JM and I next to the massive (strange) statues:

This last photo was the most weird one. It was some kind of monument that was tucked far away from the crowds, down near the river. Sorry for the terrible resolution, I had to kick it to digital zoom in order to even get it, it was so far away. Why would they have such a monument far from the people?

Needless to say, there is plenty of symbolism surrounding the Hoover Dam. Are they preparing for an alien arrival, or is it something else?