Kitt Peak National Observatory is located 56 miles southwest of Tucson Arizona in the Quinlan Mountains. I live more than 50 miles away from the observatory but I can see it from where I live. Kitt Peak is home to the worlds largest collection of telescopes including the Mayall 4 meter telescope and the McMath-Pierce Solar Telescope.
McMath-Pierce Solar Telescope
I have made several trips to Kitt Peak for the amazing views and to be able to check out the telescopes and one of my favorite things to do while I am there is visit the observation deck of the Mayall telescope which is open to the public and affords a 360 degree views of the surrounding Sonoran Desert.
I highly recommend that if you are in the area you take a trip to the observatory. You can access a virtual tour of Kitt Peak National Observatory at: http://www.noao.edu/outreach/kptour/. The entire trip from Tucson can be done in 5 or 6 hours and I recommend you take a picnic lunch and be prepared to see some spectacular scenery as well some very fascinating science.