Baldwin Park

Baldwin Park is a city located in the central San Gabriel Valley region of Los Angeles County, California, United States. As of the 2010 census, the population was 75,390, down from 75,837 at the 2000 census.
 
Baldwin Park is home to the first In-N-Out burger stand, opened on October 22, 1948. It was the first drive-thru in California and was replaced in November 2004 with a new building. The new In-N-Out University and company store opened in 2006 on Francisquito Avenue. Also, the company's first meatpacking plant is located down the street from the locations at the company headquarters on Hamburger Lane. In/N/Out now has a second meat processing plant in Texas to serve their Texas restaurants.
 
Source: wikipedia