Your are looking for a container 3 inches in diameter and 15 inches long. See photo in the gallery. It is located on gthe "Old City Trail" that goes south from Rocky Pond Road to another pond.
Fgnaqvat ba gur oevqtr be enzc, lbh pna frr vg ab zber guna 5 srrg njnl; qrcraqvat jurer ba gur oevqtr lbh ner fgnaqvat naq bs pbhefr lbh ner ybbxvat va gur evtug qverpgvba.