Vallejo
During the 1800’s, this city was the largest in California. It was also a very populous city. Now, there are only over 118,000 residents. The decline was perhaps caused by the increasing violence in the city. It used to be the city of opportunity, but poverty and crimes have worsened, especially in recent years. The figure might keep declining if nothing is done to take the city out of the said situation. On a positive note, the Six Flags Discovery Kingdom theme park is there, so at least there’s something fun.