Das Parkschloss is a family-run sauna club in the Sauerland, at Marsberg-Bredelar in North Rhine-Westphalia, and has been trading on the same site since 1992. It is open every day of the year from two in the afternoon until five in the morning.

There are two Finnish saunas — a wood-fired one in the garden and an electric one indoors — with sauna infusions twice each evening, at six and at eight. Beyond them are a heated outdoor pool set in the garden, an indoor whirlpool, a restaurant serving hot food until nine, and a nightclub bar that runs until five. Massage and wellness treatments are given by the house's own women.

The club holds a hotel licence and keeps its own separate rooms, so guests can stay the night rather than drive home. Parking is free and admission is over-18s only.