Heroes of Mt. Pocono
During the trip to Scotland, the pack was searching for three ancient Fianna tombs.
During their search, the pack found this door in the ruins of an empty castle. The door was walled up, so they only found it, when they crawled into the room through a window.
On their trip to Scotland, they spend a lot of time with the Sept of Stones, located around the Stonehenge caern.