The museum was founded in 2015 by Anna and Andrzej Mydliński who are fascinated by wolves and the nature of Biebrza river. You can visit the museum after phonecall: 508 244 805.
The coordinates lead to the museum, as well as the addresses:
THIS IS NOT A FAST CACHE. Wolf's Door is a private museum, its owners come to open it for you in their private time. Let them enjoy the meeting with you, don't come just for the cache. The cache is for those cachers who would visit the museum even if it had no cache.