The Millennium Spa & Wellness Centre is a 3,500 m² spa in the 30-storey Grand Hotel Millennium Sofia on Vitosha Boulevard, with views over the park and Vitosha mountain. It has a panoramic Finnish sauna, an infrared sauna, a herbal sauna at 50–70 °C, a steam bath, a marine bath and a hammam used with hammam treatments, cooled by an ice fountain and adventure showers, plus a salt-water panorama pool, hot tubs and a salt room.