IN the south of Krabi province (around 70km from town and near the Khao Phra Bang Khram Nature Reserve), are nature's own hot-tub jacuzzis. The water here comes from thermal springs, originating deep underground in volcanic chambers. Located in the jungle, this site features naturally hollowed-out 'bathtubs' in the smooth stone, filled to the brim with running spring water at a pleasant 35-40C.

The mineral salts contained in the water are said to ease a number of ailments, including rheumatism, sciatica and skin complaints. Although these medical claims are unproven, the effect of simply lazing in hot water up to your chin, watching the clouds go by, certainly has positive health benefits.

A visit to the Hot Springs would not be complete without a trip the nearby 'Crystal Pool' in Khao Phra Bang Khram Nature Reserve. Also known as Emerald Pool ('Sa Morakot' in Thai), this is an astonishly-hued natural pool at the centre of the forest, filled with clear spring water - although at ambient temperature. Swimming is possible here.

Tours to the hot springs & Crystal Pool are available from many agents, or you can rent a car and go it alone. There is an entrance fee of 90 Baht for the hot springs and 200 Baht for Khao Phra Bang Khram Nature Reserve / Crystal Pool.