I passed the VLA radio-telescope site on my drive back to Phoenix from the Bosque and couldn't resist a brief stop. You may remember this from the movie "Contact" with Jodi Foster. These are huge! Each of those dishes is 25m across and weighs 230 tons. There are 27 of them layed out in a Y-shape. They are on railroad tracks so they can be moved around (maximum separation is ~ 22 miles). They were all huddled pretty close together when I was there. (Read more about it here: http://www.nrao.edu/index.php/about/facilities/vlaevla )