Should you rent a car in Spain?

As Caryn and I were planning our trip to Europe, we wanted to cover the most amount of ground at the lowest cost. We’d heard that trains were a good way to travel around a variety of European countries, but we didn’t like the constraint of time and location that the train system provides. Plus, the cost would have been upwards of $350+ per person for our 10 days of travel. So instead we decided to research the ultimate transportation question: should we rent a car in Spain?
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