Alternatively of the cold well at ACQUAin Spa & Wellness you can also find the bucket for the Scottish shower.
The Scottish shower is a bucketful of cold water from above that you can spill onto your body by pulling a rope that's connected to the bucket.
If instead you want to cool only a specific part of your body there is also some ice to use for a gentle massage. At ACQUAin Spa & Wellness there's also a small waterfall of crushed ice, useful during the cooling. You just have to take the ice from the waterfall and gently massage it on your body, starting from the lower extremities. You have to be careful not to drop the ice you used on top of the waterfall. The eventual extra ice must be thrown under the waterfall, near the nozzle.