If you fancy a sauna without having to pay for the whole spa & beauty package, then this might be for you. These wooden cabins on the beach next to the M15 restaurant are open from October until mid-May and you can join the 'open' sauna for as little as 50zł for 90 minutes. Alternatively, if you prefer not to share with strangers, you and up to 10 friends can rent out the Sauna ONLY4U from between 200zł-600zł (price depends on the time of day) for 90 minutes. Sweat it out with views of the sea and then cool off by running straight into the frigid Baltic if you're crazy enough. It doesn't get much better.