The US National Park system is celebrating National Park week. Besides free entry for the weekend, Seniors (62 and older) can obtain a lifetime pass for $20. Sadly, I'm one year too young. It has to be completed by June 2017
https://www.nps.gov/seki/planyourvisit/upload/Mail-in-Application-for-Senior-Pass-expires-6-2017.pdf
NPS.gov Homepage (U.S. National Park Service)
National Park Week (U.S. National Park Service)
https://www.nps.gov/seki/planyourvisit/upload/Mail-in-Application-for-Senior-Pass-expires-6-2017.pdf
NPS.gov Homepage (U.S. National Park Service)
National Park Week (U.S. National Park Service)