Grande Centre Point
Sukhumvit 55
Home to Bangkok's most celebrated onsen experience
Let's Relax Onsen & Spa
Nestled in the heart of Thong Lo — Bangkok's most vibrant neighbourhood — Grande Centre Point Sukhumvit 55 is one of the few hotels in Asia to offer a full Japanese onsen experience within a luxury urban setting. The hotel's centrepiece is the multi-award-winning Let's Relax Onsen & Spa, occupying the entire 5th floor and drawing guests from across Bangkok and beyond.
Let's Relax has been a cornerstone of Thai spa culture since 1998. This Thong Lo location is the only one in Bangkok with an authentic Japanese onsen facility — separate Gentleman and Lady zones, each with a variety of mineral pools, a Tatami Mat Room, Hot Stoned Bath Room, and Cool Down Room. The architecture draws directly from traditional Japanese bathhouse design: warm timber slats, lantern lighting, and the meditative stillness of still water.
Beyond the onsen, the spa offers an extensive treatment menu — Thai massage, Swedish massage, aromatherapy, hot stone, body scrubs, wraps, and facial treatments — delivered across 15 massage rooms and 7 specialist treatment rooms. It is a complete wellness destination within a single building, open daily from 10am to midnight.
Facilities
Japanese Onsen — Gentleman's Zone with mineral pools
Sauna & steam rooms within the onsen complex
Onsen pool hall — warm mineral baths and cool-down pools
Treatment rooms — Thai massage, aromatherapy, and body rituals
What's Included
Japanese Onsen
Separate Gentleman & Lady zones, mineral pools, hot stone bath, cool-down room
Sauna & Steam
Traditional Finnish sauna and aromatic steam rooms
Tatami Mat Room
Authentic Japanese relaxation space for quiet rest
Massage Rooms
15 private massage rooms for Thai, Swedish, hot stone and aromatherapy treatments
Treatment Rooms
7 specialist rooms for facials, body scrubs, and wraps
Foot Reflexology
6 foot massage chairs and 5 head & shoulder stations
Official Details
Address
Grande Centre Point Sukhumvit 55
300 Sukhumvit Soi 55 (Thong Lo)
Klongton Nua, Wattana
Bangkok 10110, Thailand
Contact
Let's Relax Spa
Location: 5th Floor
Hours: 10:00 am – 12:00 midnight
Awards: Multi-award winning since 1998
BTS Thong Lo Station — 5 min walk · Coordinates: 13.7310° N, 100.5822° E
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