FATHER & SON PUTTING UP SIGNS GRANDPA'S BRIDGE Son of former owner, Bill Jr. created the nature trail as a child and has continued to maintain it for the enjoyment of all. With the help of his father he has created signs for each plant species encountered along the meandering path. This information contains not only cultural and natural history, but also fun trivia as well. Incense cedar is one of the trees. Did you know that pencils are made from the heartwood of this species?