Visitors climb from level to level via a retractable steel ladder, which begins at the ground-floor plunge pool. The architects used industrial materials like steel and concrete throughout to "keep it raw,” according to Kampshoff.  Photo 4 of 8 in Inside This Modern Tower Is an Idyllic One-Man Sauna by Nadja Sayej

Inside This Modern Tower Is an Idyllic One-Man Sauna

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Visitors climb from level to level via a retractable steel ladder, which begins at the ground-floor plunge pool. The architects used industrial materials like steel and concrete throughout to "keep it raw,” according to Kampshoff.