OT: Most fun in Arizona?

[Josef Lowder]

What are the most fun things to do in Arizona?
I moved here from Washington state  8 years ago
and while I am now aclimated and glad to be here,
I do miss all of the incredible variety of things that
we so much enjoyed doing in Western Washington.
When we have guest from out of town, I am hard
pressed to think of things to suggest.

So, what do you good plug friends recommend?