The Baños Termales de San Mateo are Moyobamba's easy half-day escape: warm mineral pools set in lush foothills only a short mototaxi ride from town. They are developed rather than wild, but the setting is still green and restful.
Go early or outside weekends if you want quiet. The appeal is not luxury; it is the simple pleasure of soaking in hot water after dusty roads and humid walking.