I'm an international applicant and I had a fun interview with my POI a month ago (Dec 27, if I remember correctly). We talked about the overlap in our research interests, possible studies, structure of the program, funding, etc. I was told I'd hear back from the department, either way, towards the end of January - no word yet. So I'm assuming there's no visitation weekend. I don't know if the process is different for students applying from within North America.
Anyway, best of luck!