This cache is located at the entrance to Furnace Point Resort. To get there, turn on to Furnace Point Lane (a dead end dirt road) and drive (or walk) to the end of it where you will get to a gate. You do not have to go through the gate to find the cache. The cache was placed with the owner's permission. If there is an event going on there, please be respectful that they may not want uninvited guests entering the gates.
This location has a long gloried history. The base of Sisco Furnace (1847) still stands at Furnace Point Resort. It could produce up to nine tons of pig iron per day with a continuous blast that lit up the bay at night. The company town that was at the end of Furnace Point Lane, called “Jacksonville” while the furnace was in use, included worker housing, offices, a store, and homes for Mr. Jackson and the company book-keeper.
In the mid 1900s it was the site of summer camps, like Camp Champlain, from which a boy named Robert wrote his father, Allan Sherman, a letter that became the basis of his father's song "Hello Muddah Hello Fadduh," which rose to No. 2 on the Billboard Hot 100 list in 1963.
Sources:
A Walking Tour of Westport, New York (for Sisco Furnace history)
Wikipedia (for Hello Muddah, Hello Fadduh history)