The purpose of this cache was to highlight the Hallforest Woods and castle from Kintore. The castle dates back to the 14th century when Robert the Bruce planned to build this amazing castle. it was visited later on by Mary Queen of Scots in 1562. the entrance to the tunnel is accessible by Castle Road and there is a turn off just before the tunnel where you can park your car, it is a short walk through the tunnel to the cache. Tweezers not advisable and you can take your own pen/pencil, Good Luck