Under The Sea Traditional Geocache

Take a journey under the sea.  Sea if you can discover the treasure beneath (very punny right?!)

This is a large cache which is accessible during daylight hours as it's on private property (house# 8103).  Don't worry, it's ok to walk on this property. Your first big clue, is that it's located on the east most area of the property, near the hedge. No need to go past the gate or in the backyard. Please shut the cache door tightly after you have discovered this hidden gem. Looks can be deceiving, don't overlook the obvious :)