Want something that won't cost a fortune? Say hello to the economy car. This small but dependable vehicle is the most booked category of rental car in Puerto Rico (and ideal if you're on a tight budget). Top up the tank on the cheap and you'll be zooming around cities like San Juan and Caguas in no time.It's always fun to get out of the city, and if you do, get set to be richly rewarded. With coral reefs, sandy shores, and mountains to check out, Puerto Rico offers loads of day trip opportunities. A bigger vehicle like an SUV or a four-wheel drive will give you and the crew more room and comfort for those longer drives.