A review of Lake County’s hidden spa retreat. Spring is finally in full swing now that the temperature is starting to drop again, which means relaxing in warm water is back on the table. If you’re looking for a quiet place to unwind in Northern California, Harbin Hot Springs is definitely worth a visit. Harbin, located about an hour north of Napa Valley, in the small town of Middletown, has long been a retreat destination. The resort dates all the way back to 1856, when it w