Celik Palace Hotel, Bursa, Turkey. This Hotel boasts a 'standard' mineral bath from a mountainside source but also a radioactive water source, where you are escorted to a small cubicle with a chair and bath. The bath is run and an egg-timer is turned, timing you a dip of about 5 minutes. Any longer and you are forcibly removed. Apparently this is quite a tiring yet refreshing experience!