THIS IS A "GADGET CACHE". YOU WILL NEED TO DO SOMETHING TO GET TO THE LOG ONCE YOU FIND THE CACHE. I HAVE INSTALLED SEVERAL OF THESE CACHES IN THE AREA HOPING TO MAKE A SMALL "GADGET CACHE TRAIL". The cache is located on AVIS property in Andover's Fish Brook North conservation area. The cache is off Harold's Trail but can also be reached by bushwacking from Helen's Trail but you will find more water to navigate. Parking is off Chandler Road. There is closer parking at the Wood Hill Middle School off Cross Street but park there only during non-school hours. There are quite a few caches in the area so you can make a day of it. Depending on where you park or what other caches you do, you may see some heron nests and beaver lodges. There's some bushwhacking required but nothing too strenuous just longish. Please bring your own pen. There are 2 containers - one has replacement marbles as needed and the other one is for swag (4 $5 gift cards for Wamasit Lanes in Tewksbury for FTF). PLEASE PUT EVERYTHING BACK IN THE SAME ORDER SO OTHERS CAN HAVE THE SAME CHALLENGE.