This should be a fairly simple to find letter box cache. It is in an ammo can at the base of a large pine tree covered in natural debris to help it stay hidden. Please put it back as you found it so that it may last for years to come. It is off the main path, but not a bush whack by any means.
It is located in Oak Hammock park and one of many St Lucie city parks. There are some nice trails to stretch your legs and some beautiful scenery as you wind your way through the trail system.
There are a couple more caches out here for you to enjoy if you have not already found them.
There is an unactivated Christmas gift travel tag for first to find.