Let's Relax Thonglor spend time relaxing with spa massage and onsen in the heart of Thonglor. Experience a top-level relaxation. Let time pass slowly. along with providing relaxation to let the body get the real peace with the most of the two Asian sciences. Meet Bangkok onsen here. Let's Relax Onsen & Spa for the first time with a one-stop spa on an area of more than 1,800 square meters in the heart of Bangkok. that you will experience the spirit of peace with a soaking onsen in Sukhumvit-Thonglor area with a top spa package that comes with a spa massage with authentic Thai fresh herbs