This cylindrical tower is a silent remnant of Lausanne's medieval past when it served as a part of the fortification.
Wikipedia http://fr.wikipedia.org/wiki/Tour_de_l%27Ale
Info http://www.lausanne.ch/en/thematiques/culture-et-patrimoine/architecture-et-monuments/lausanne-medievale/tour-de-l-ale.html
Address Rue de la Tour, 1003 Lausanne, Switzerland
Coordinates 46°31'26.306" N 6°37'39.642" E