The Paul Reed Smith factory in Stevensville, Maryland is now offering public tours. From a press release, via Guitar Noize:
(V)isitors will get a firsthand look at PRS Guitars’ processes, instruments, and amplifiers from raw wood or blank chassis form to finished guitar or amplifier. The guided tour, which lasts approximately 90 minutes, takes scheduled visitors through the electric guitar manufacturing line, amplifier department, and acoustic shop.
Read more and see pics of PRS guitars in various states of completion at Guitar Noize.