The plunge pool is fed directly from the same spring system as the warm pools, just without the heating stage — so the mineral content is identical, only the temperature differs.
The circuit is three plunges of roughly thirty seconds each, with several minutes of rest between them on a heated bench nearby. We ask first-time guests to try one plunge before committing to the full circuit.
This is the ritual guests describe most differently from each other — some find it the most alive they feel all week, others do it once and never again.