"Let's Relax Spa: Thonglor Take time to unwind with spa and onsen services right in the heart of Thonglor. Experience a superior relaxation journey where time seems to slow down, allowing you to enjoy true tranquility as you release stress from your body with the essence of two traditional Asian practices. Discover Bangkok’s onsen right here at Let's Relax Onsen & Spa, a first-of-its-kind comprehensive spa spanning over 1,800 square meters in the center of Bangkok. Immerse yourself in the spirit of serenity with an onsen experience in the Sukhumvit-Thonglor area, enhanced by top-notch spa packages that include authentic traditional Thai herbal massage."