At Escobar International Airport, several billboards can be found, and one of them has a reference to Liberty City embedded on it. The billboard reads Take a vacation in Liberty City with a screenshot of GTA III, in which Claude can be seen driving a Moonbeam on the streets of Liberty City. A damaged taxi is also present in the screenshot. Through this billboard, Rockstar is possibly trying to attract GTA Vice City players to play GTA III. Because Liberty City does not appear in GTA Vice City, this billboard is just an Easter egg.