10 Crazy Facts About Las Vegas

4. A secret city underneath Lake Mead

Plenty of the water used in Las Vegas comes from Lake Mead, a huge reservoir. You probably do not know that back in the early 1930s, the area of St Thomas was home to several residents. The government needed to set up the Lake Mead reservoir at St Thomas to provide water, and the people here had to leave. Instead of destroying everything in St Thomas, they filled up the area with water leaving the town below the water.