Situated on the 5th floor of Grande Centre Point Hotel at Thong Lo, this Let’s Relax Spa outlet is the only one in Bangkok that has an onsen facility (the other one is located in Pattaya). Since my husband and I had never had an actual onsen experience before, I thought this would be a … More Review: Let’s Relax Onsen & Spa, Grande Centre Point Hotel Sukhumvit 55 (Bangkok, Thailand)