Auschwitz-Birkenau is a place of remembrance, and a visit is a serious undertaking rather than a day-trip highlight. Almost every option below is a guided tour with an educator and return transport from Krakow; what differs is mainly the pickup, the group size, and whether the salt mine or the ghetto sites are added on. Choose the one that suits your schedule, allow a full unhurried morning, and go with the quiet the place asks for.