After something that won't cost a fortune? Meet the economy car. This small vehicle is the most popular type of rental car in Slovenia (and ideal if you're sticking to a budget). Top up the tank on the cheap and you'll be easily exploring cities like Ljubljana and Maribor in no time.It's always fun to take time out from the city, and if you do, you'll be richly rewarded. With sandy shores, caves, and gorges to take in, Slovenia offers endless day trip opportunities. A larger vehicle like a four-wheel drive or an SUV will give you and the crew more room for those longer scenic drives.