The eight largest city in the United States and the second largest city in California, San Diego is known as the Birthplace of California. Immediately to the South is Tijuana, Mexico and the two cities are known as a metropolitan conurbation.
Pittsburgh is the second largest city in Pennsylvania behind Philadelphia, but some would say it is much prettier. It’s located at the confluence of the Ohio, Monogahela and Allegheny Rivers and has 446 bridges making it quite picturesque and known as the “City of Bridges” as well as the “Steel City” for its multitude of more than 300 businesses related to steel.
Being the most populous city in Arizona isn’t easy, but it wasn’t so big when Phoenix was founded in 1867 by Jack Swilling. He saw a potential for farming while he was traveling down the Salt River Valley and the “Valley of the Sun” was born. The name Phoenix was chosen because it was a city which was born from ruins.