We have a book at our cottage where all visitors are expected to write something about their stay. Pretty much a guestbook.
It originally started as sauna book as the first one was officially called that. I can't remember how long it has been there, but I thunk it was already in use when my grandparents were alive and living there. I could check the date of the first entry from the first book, but unfortunately I'm not there anymore. Next time then.
Sauna book would still make a whole lot of sense. Almost everyone visiting there usually also goes to our sauna. But sure, there is always so much more to write about. It's fun reading all those stories years later and remember all those good times. Of course it can be used as a simple guestbook too to check who has been there and when.
There are also a lot of running jokes among our family regarding writing those entries. Everybody also has their own style of writing.
Writing your entry is always something to look forward, but it's also a sad moment as it means it's almost time to leave the cottage behind once again for a while.