Ancient Underground City of Wiang Kum Kam in Chiang Mai

Anyone who has visited Chiang Mai, Thailand has heard about the 36 temples (wats) within the Old City walls and spectacularly gilded Doi Suthep temple, an important wat that offers stunning views of Chiang Mai from its hillside perch atop Doi Suthep Mountain. Strangely, the site that holds the most significance for this ancient Lanna capital is virtually unknown.