San Kamphaeng Hot Springs

This guide to San Kamphaeng Hot Springs outside Chiang Mai starts underground, where mineral water boils past one hundred degrees Celsius, hot enough to cook an egg in a basket lowered on a pole. It traces how villagers from the hills around Mae On once came simply to boil vegetables and soak sore joints, long before a royal initiative project turned the site into a landscaped park with geysers and canals. Bring a basket of eggs and time the minutes as you lower them into the steam.