The mineral spring at Rimske Toplice has been bathed in since the Roman Empire, and the resort built around it keeps the evidence in plain sight: Latin phrases around the baths, and walking paths lined with trees donated by nineteenth-century visitors, among them a giant sequoia from Victoria of Prussia. The main pool runs from a quiet indoor hall out to a terrace facing the forested hills, and two smaller hot pools have jets. Bring a bottle for the spring itself.