Lake Geneva to swim at some beaches of the lake; indeed, visibility under water was near zero. By the 1980s, intense environmental pollution (eutrophication) had almost wiped out all the fish. Today, pollution levels have been dramatically cut back, and it is again considered safe to swim in the lake. Major leisure activities practiced include sailing, wind surfing, boating (including water skiing and wakeboarding), rowing, scuba diving and bathing. On a scientific footnote, in 1827, Lake Geneva was the site for the first measurement of the speed of sound in (fresh) water. French mathematician Jacques Charles François Sturm and Swiss Physicist Daniel
The Riviera (Lake Geneva, Wisconsin) time for a dance on September 1 later that year. Local architect James Roy Allen was selected to design the building. The total cost was only $55,000. In 1980, the building was rehabilitated by local architect Daniel Curran. As the "most intact historic building associated with transportation in the Geneva Lake area," the Riviera was listed on the National Register of Historic Places by the National Park Service on April 3, 1986. From the 1930s to the 1950s, the Riviera ballroom hosted such renowned swing and jazz bandleaders as Benny Goodman, Glenn Miller, Duke Ellington, Louis Armstrong, Tommy Dorsey, Gene