Do yourself a favour and book the gong bath - available every first Saturday of the month through their website. The subterranean bunker (with a room fully immersed in water – looks INSANE) combines sound healing with art by Edmund de Waal and "Asian achievements" from the sixth and 16th century.. Don't be scared – the tour starts in complete darkness. Bring a sweater for the gong bath part, and expect to be surprised.