Such a creative way to use a funky shaped space.
An alternative to the popular but complicated to detail trough drain... just let water drain through slats into the base below! Gallery | Australian Interior Design Awards
Untreated sauna benches and panel walls can be blackened using the Supi Sauna Wax by Tikkurila. This water-soluble solution with natural wax is colourless but it can be tinted black.