Alchemy's flagship bathhouse fills the old Royal George Hotel on Duke Street with three traditional Finnish saunas run at about 90°C, a steam room, a 50,000-litre ice pool, ice showers and a hot magnesium pool. It opens seven days from 5am to 9pm, a drop-in session is $35, and entry is 18 and over. Guests wear swimwear or activewear and bring two towels.