The main draw of the oldest spa town in Central Europe is its natural thermal springs, whose healing power is documented by archaeological finds of coins dating back to the ancient Celts and Romans. The most important of them is the Pravřídlo (Primal Spring), which supplies hot mineral water to spa houses throughout the area. For cyclists who want to refresh tired muscles after a long ride, the ideal stop is the modern Thermalium complex, whose indoor pools are filled exclusively with this 100% thermal water. The whole spa zone lies right next to the town's extensive parks, which are very easy to reach from the cycle route.