This is a wooden box with a combination lock. The combination is the year the park was established (Google or park staff can answer).
Inside you will find a fun fact quiz that you can take with you into the park. The quiz is optional; as it's just for fun, and the answers can be found on the park history signs throughout the park. Under each question it tells you what area the answer can be found. Answers to the quiz are on the back of the sheet.
I hope you have a wonderful time geocaching in the park!