hot sand bath
A therapeutic or leisure activity where one is buried in naturally or artificially heated sand, often at hot spring resorts.
Sand baths are a popular experience at hot spring resorts.
I enjoyed a sand bath at the beach.
Kana-mixed variant; commonly seen in casual or promotional contexts.
Compound of 砂 (sand) and 蒸し (steaming), from the verb 蒸す (to steam). The term describes the process of being heated by hot sand, often at volcanic hot spring areas.