Russian steam bath, the Finnish sauna & the whirlpool. Wiesbaden’s close connection to its springs dates back to the the Romans. 26 thermal springs, including some of the hottest in Europe & the Faulbrunnen fountain (which is not classified as a thermal spring due to its water temperature of only 18°C). The origins of the springs are unclear, but they’re thought to be at least 200,000 years old