Once Upon A Thai Wellness and Spa (Ratchadamri)

Wellness · Pathum Wan

231/4 Soi, Sarasin Rd, Lumphini, Pathum Wan, Bangkok 10330

Rated 4.9/5 from 2720 reviews.

Data checked on 23 May 2026.

Worth seeking out if you want a spa that has both pedigree and polish. The 2024 Best Wellness Spa recognition, a near-perfect rating from a very large reviewer base, and a retail line of own-brand wellness products, including aromatic oils and traditional herbal compress balls, all point to a house that takes its craft seriously. The Ratchadamri location adds onsen access to an already strong treatment menu.

You step into the Ratchadamri branch of Once Upon A Thai knowing the venue has earned its reputation: a 4.9 rating from over 2,700 guests and the Best Wellness Spa 2024 title, both confirmed on the spa's own website, greet you before the therapists do.

Located on Soi Sarasin in the Lumphini district of Pathum Wan, the branch sits close to the greenery of Lumphini Park, giving the address a quiet sense of remove from central Bangkok's main commercial corridors. The spa operates two Bangkok locations, with the Ratchadamri branch distinguishing itself through an onsen facility that positions it beyond the typical massage-and-treatment format.

The service menu is organized around signature treatment programs and a dedicated facial treatment section. While the full menu is presented in image format on the website, the presence of both body-focused signature programs and standalone facial offerings confirms a breadth of treatment options suited to guests looking for either targeted or full-body care.

Once Upon A Thai also operates its own retail line. The spa's shop carries products including nourishing aroma oil and traditional Thai herbal compress balls, both formulated to extend the in-spa experience into the home. This own-brand range signals an investment in the wellness philosophy beyond the treatment room itself.

For guests staying or shopping in the Ratchadamri and Lumphini area, the location is a natural fit. The spa serves both walk-in and pre-booked guests, and the volume and consistency of its reviews suggest a clientele that returns regularly. Built for those who want a benchmark spa experience in central Bangkok, Once Upon A Thai Ratchadamri delivers on both setting and substance.