For that wonderfully calming experience, you might want to try any of these onsens: Bessho Onsen, Kakeyu Onsen, Reisenji Onsen, Kakuma Onsen, and or the Muroga Onsen Sasaranoyu. There are also other charms that can be found in Ueda, for instance, you may want to check the Ueda Castle Park, Sanada Village, Unnomachi, Zensanji Temple, Anrakuji Temple, and Yanagimachi Street for a touch of historical significance. If you're more leaning towards a nature getaway, Ueda has also some to offer such as the Sugadaira, Hiking to Mt. Taro and or Mt. Ogamidake and Megamidake and Toishi & Komeyama Castles Mountain Fort Hiking.