Harbour Wellness is a floating wellness deck run by The Red Apple Marina on the Wijnhaven in central Rotterdam, with saunas, an ice bath and a hot tub on the water of the old harbour. Walk-in sessions last two hours and are shared with at most five other guests; the whole deck can also be hired privately for up to eight people. Off-peak weekday daytime slots cost less than evenings and weekends, and a monthly membership is offered.