Aachen's thermal springs has made it a popular spa resort town since Roman times. The first iteration of the Elisenbrunnen was opened on May 1827. It was rebuilt in the 1950s after suffering damage during WWII. Two other fountains in Aachen also release water from the hot springs. All have signs indicating that it is not drinking water. At 50C, it was also much warmer than I expected. There are four plaques listing people who have visited the springs before, including Charlemagne and his father, Pepin the Short read more