Ojo Caliente Hot Springs in northern New Mexico has been valued since prehistoric times, when ancestral Pueblo peoples and later other Native groups used its sacred thermal waters. Tewa tradition links the springs to P'oseyemu, and a large Puebloan settlement of more than 1,000 people once stood here before likely being abandoned in the 16th century. Spanish colonizers also came to the springs, which grew in renown after the 19th century as a therapeutic resort. A bathhouse built in 1860 helped establish the health spa, and improved transportation encouraged a small town nearby. Today the site is known for its mineral pools, historic resort buildings, and distinctive adobe round barn.