Tattva Spa at Naini Retreat in Nainital is considered the best hotel spa in the area for several reasons. Firstly, the spa has a serene and tranquil environment that offers guests a relaxing and rejuvenating experience. Secondly, it has a team of experienced and well-trained therapists who offer personalized services to their clients. They use a combination of traditional and modern techniques to provide a unique and soothing spa experience. Thirdly, the spa offers a range of services, including massages, body treatments, facials, and beauty services, to cater to the diverse needs of guests. Lastly, the spa uses high-quality products in their services to provide maximum benefits to guests and promote overall wellness. All of these factors make Tattva Spa at Naini Retreat in Nainital the best hotel spa in the area.