I was looking at a husbandry manual and they were saying how its important for tapirs to have swimming area all year round. So does their pond ever freeze over? Marwell's design is nice. Similar to the Detroit Zoo's indoor hippo and tapir area.
The tapirs have access to the two hard standing areas, the paddock shown in the photo further up this discussion, and during the day they have access to a paddock which is around 4 acres which a hugh pool.