In addition to being the most affluent city in the U.S., Plano is home to the headquarters of numerous top companies, making it a popular destination for business travelers to the Dallas area. Its proximity to Dallas, Fort Worth, Arlington and other Dallas area cities makes it a perfect base for a leisure vacation, as well, with plenty of entertainment within reach, ranging from the Six Flags Over Texas park to Southfork Ranch. Plano's annual Balloon Festival draws visitors from far and wide.