How could one place a cache like this, and with so many muggles around! Actually one might pretend to be searching for a lost disc or a foul ball. In reality, a small wasp in the Cynipidae family lays its eggs in the twigs of the valley oak, Quercia lobata, which stimulate the tree to grow what are sometimes called oak apples. Here at Feeney Park, there is often quite a bit of activity between soccer in the fall, softball and baseball in spring, and disc golf all year long. Early weekday mornings are probably the best times to avoid muggles. There are also lots of trees and bird life here which you could pretend to be observing.