Opened back in 2012, this was Thailand’s first onsen and it’s the real deal. That means men must go commando, while women get the option of disposable undies (men and women bathe in separate sections). If this thing is new to you, fear not, there are cartoons detailing the whole procedure. The water is said to be sourced from a hot spring in Ranong; choose from carbonated, hot, cold or jet-equipped baths to increase blood flow and rejuvenate your skin. Rates start from B450 for all-day onsen, and B350 for Thai massage (60 mins). There are also aromatherapy body massage starting from B900 (90mins)-B1,100 (120 mins) and body scrub for B750 (45 mins).