Freiburg was visited by me in the year 2011. From Switzerland (Basel) it took one hour by train. Freiburg was incorporated in the early 12th century and developed into a major commercial, intellectual, and ecclesiastical centre of the upper Rhine region. The city is known for its ancient university and its medieval minster, as well as for its high standard of living and advanced environmental practices. The city is situated in the heart of a major wine-growing region and serves as the primary tourist entry point to the scenic beauty of the Black Forest. According to meteorological statistics, the city is the sunniest and warmest in Germany. Because of its scenic beauty, relatively warm and sunny climate and easy access to the Black Forest, Freiburg is a hub for regional tourism.
The city Freigurg of Germany has an unusual system of gutters (called Bächle) that run throughout its centre. These Bächle, once used to supply water to fight fires and feed livestock. Water in the Bachle constantly flowing day night, with water from the river Dreisam. This river water is fed to the Bachle and runs continuously. These Bächle were never used for sewage, as such usage could lead to harsh penalties, even in the Middle Ages. During the summer, the running water provides natural cooling of the air, and offers a pleasant, gurgling water flow sound. It is said that if you fall or step accidentally into a Bächle, you will marry a Freiburger.
(Info source : wikipedia)