This micro is placed at the back of an old mining casemate for Fort Williams, back when it was a military base. First built in 1891, the casemate's purpose was to control mines in Portland Harbor. In front of this is a semi-buried, rusted old tramway that connected the casemate to the rest of the fort. Behind it sits Battery Hobart, which was the last battery built during the first wave of buildings in Fort Williams (late 1800s).
The walk to this cache is tough at high tide; a little easier at low. The limbo is harder, and the second limbo is worse. This is ment to be a very hard challenge. The hint still applies, even though the cache was moved.