I swung through Fort Worth on my way to Dallas, and could not be happier I did! I initially learned about the facility while working as a bank teller via a strap on currency. This is a great stop, free of charge; and mind blowing. The visit included a free self guided audio tour, as well as a 15 minute informational video. The staff were very friendly and helpful, and it was fun while walking around the observatory catwalk having the employees printing the notes wave or give a thumbs up when the see you!