The Patio - preserve Traditional Cache

The Patio is a new neighborhood park in Palm City that open on June 1st this year. Among the amenities are a new picnic shade structure; a freshwater fishing pier, a walking path around the stormwater treatment area; ping pong tables; cornhole sets, chess/checkers tables; and a lighted fountain in the stormwater treatment area. There are no restrooms but now there are some caches here too. 

You are looking for a preform on a small oak.