Directly at the northeast corner of Southwest Parkway and Wellborn, this was originally a Citgo/7-Eleven when it opened in June 1986 (7-Eleven stores, at least in this part of the country, were paired with Citgo gas). In 1993, 7-Eleven left the area but the stores (now under E-Z Mart) kept the Slurpee machines (later rebadged as ICEE), so this was the cold slush drink headquarters growing up. Unfortunately, the machines later broke down and the owners did not replace them, ending it as a place to get frozen Dr Peppers. In 2004, the store converted to Zip'N, and I remember when the store's name was a ground display surrounded by bushes (this was done away with in a station renovation). Later on, the gas station parking lot was integrated with Southwest Crossing around it.
The intersection has evolved--the once-quiet southeast corner has turned into not only parking lot access for a large apartment complex, but a number of other establishments (Starbucks, Chipotle, Whataburger, Wild Pita, and Andy's Frozen Custard), but the Citgo continues to age. While it's still technically signed as a Zip'N, there's a sign above it saying "Ricky Food Mart" or something along those lines, and it's a bit depressing to see a gas station once a family favorite for gasoline fall into disrepair, but that's life, I guess.
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