Tamarind Springs
Day SpaKoh Samui, Surat Thani
A forest day spa on Koh Samui built around granite steam caves, waterfalls and plunge pools, open daily with walk-in or day-pass access.
$
Day Spa in Thailand
2 spas match
Pai, Mae Hong Son
A walk-in herbal sauna and cold-plunge spot in Pai with a restaurant and lounge attached, open daily 8am-10pm.