“Soaking in a hot-stone bath is the Bhutanese’s most beloved practice to promote holistic healing,” says Tshering Deki. She’s the proprietor of ZAnTA, a hot-stone bathhouse situated on the banks of the Paro Chhu, the river that wends its way through the Paro valley. “The demand for health and well-being treatments is increasing – both locally and globally,” she points out. But the hot-stone bath isn’t just another wellness treatment – it’s been an essential cultural ritual here for more than 13 centuries. It’s also an act of hospitality, as the host takes care – and time – to prepare the experience for guests, stoke the fire and heat the stones.

The indigenous custom dates to at least as early as the seventh century, and was later influenced by Tibetan medicine and Indian Ayurvedic wisdom. “The water we use here at ZAnTA is natural spring water,” says Tshering. “It’s got healing properties in itself, but we also infuse it with plants and tree barks that have medicinal properties.” The fragrant wormwood, or artemisia absinthium, is the most archetypal ingredient – one of two key elements in a Bhutanese hot-stone bath.

More than the medicinal waters – or menchu – it’s the mineral-rich rocks used to heat the water that make the hot-stone bath so distinctive. Pomelo-sized stones are heated in an open fire outside the private bathing facilities. These are then deposited through a discreet hatch in the wall into a closed-off section of the bath (so there’s no danger of burning yourself). As the white-hot rock breaks the water’s surface, it sizzles and spits, heating the water and releasing precious minerals. “This combination [of plants and minerals] helps with ailments such as joint pains, muscle recovery, skin conditions, stomach disorders and urinary-tract infections, as well as mental relaxation,” explains Tshering.

Traditionally found outside farm houses – in the back garden or near a river – hot-stone baths are now widely available. Today, the wooden baths, or wa, are found across the country, from isolated mountain villages to luxury, five-star resorts. “Villagers use hot-stone baths as a day-to-day cleaning ritual,” says Tshering, “while the urban population enjoys the practice as a relaxing getaway.”

Standalone hot-stone bathhouses are thriving and innovating as entrepreneurial locals respond to demand. At ZAnTA, guests can also sample dishes made using organic vegetables from the local village, or opt for an express foot bath. And, if bathing in the life-giving waters isn’t enough, many bathhouses also offer the opportunity to try Bhutan’s other aqua vitae – ara, the much-loved spirit – which is great to sip on whilst soaking up the experience.