http://www.pari.edu/about_pari/news/annual-space-day-open-house-at-pari
Lots of info on the website, enjoy

Oh, I forgot to say this is located in Pisgah North Carolina.
Maps and Directions
The PARI 200 acre facility is located in the Pisgah Forest near the Blue Ridge Parkway west of Asheville - 15 miles Northwest of Brevard, North Carolina. See note
Driving Directions to PARI
From Brevard, NC...
Travel West out of Brevard on US-64. About 9 miles west of Brevard turn right onto NC-215 North (notice the Headwater Outfitters landmark).
Travel 6 miles on NC-215.
Turn left onto Macedonia Church Road. Go 1.6 miles. Pisgah Astronomical Research Institute is on your left.
Go through the main gate and travel about 0.5 miles. You will reach a guard checkpoint.
Drive to Building One. Park next to the flagpole. Enter the main entrance and sign in.
Phone 828.862.5554
Important Note:
Volunteers at PARI find the periodic Volunteer Weekends (see Calendar) to be a perfect way to see the site and add to our progress - without disrupting normal operations. To be a volunteer, Please contact Charles Osborne, via email, for details on how to join the Volunteer List. In order to plan our tasks more efficiently, we must insist that you email or phone no later than 24 hours before a Volunteer Weekend to let us know if you will be able to attend and help.