We went to the sauna. Understandably cameras are prohibited behind the closed doors of the premisis. A perfect parellel universe with relaxation purposes!
Btw, these doors do not lead to the sauna. I pass this massive gate every day on the way to my work. Believe it or not, it's just a side entrance to a monumental office building by C. Elffers and A.A. van Nieuwenhuyzen. It's one of the first post-war buildings in Rotterdam, designed as a traditional bank for the Dutch Trading Society. Nowadays it's a national monument and therefore the original interior remained almost completely intact during the recent renovations.