text: Green Hills has joined the now 18 preserves to visit to gather “code words” to earn a Natural Lands Trust fleece vest—more preserves now than when I did the challenge!
  Visit all 18 preserves, collect the code word that is at the kiosk or parking area, and submit them to us to receive your vest.
  Naturally, I’ve blurred out the code word in this photo of the sign at Green Hills Preserve. You’ll just have to go visit the preserve, and while you are there, enjoy the two miles of trails, wildflowers, and scenic vistas.