What the Heck is That? Contest

Yesterday I showed you some of the outside. Today I'll let you see some inside.

Did I mention that the person that comes closest to guessing what this is will win their choice of any 5x7 or 5x5 photo, a $15.00 value, from my Etsy Shop! To enter please leave your photo choice and a way to contact you.

Yes it is a memorial, in fact, a national memorial. Now can you tell me the name and where it is?

What the heck is that?

There it was perched on the western landscape like some big giant white bird. You could see it from quite a distance, the geometry an antithesis to the natural world. It beckoned, we came. What is it, where is it? Any ideas?