The bubbling, stinking mud pool that could cause chaos at the San Andreas fault

California's largest lake, the Salton Sea, was created by accident in 1905 and was transformed into a vacation location by developers who built up the shoreline with resorts, hotels, yacht clubs and more. By the 1950s, thousands flocked to vacation there, including celebrities like Frank Sinatra and The Beach Boys. At one point, it was the most visited destination in the state - beating out Yosemite National Park. During the 1950s and 60s, celebrities flocked to the area to kick back and relax with some fun in the sun for vacations. Eventually, developers and officials saw an opportunity to bring tourism to the area so they began building fancy properties and yacht clubs around the Salton Sea.