Talk:Kaer Morhen/@comment-191.249.24.75-20170608134944/@comment-66.191.157.58-20180111225759

If memory serves, it leads to the caves under the fort. Where the Witcher's secrets were kept. The fort as a whole and the caves took heavy blows during the opening parts of the first Witcher game. Leading one to believe the lake and rivers ended up flooding the caves.