I recently completed a long road trip and realized partway through. I spent the first few days listening to an audiobook every time I got into the car. But one day, during a particularly long drive, I finished it. And I didn't put anything else on. A few hours later, I realized I'd spent those hours lost in my own thoughts in a way that just never occurs anymore.

Driving is the opposite of relaxing to me but I guess it is just you and your thoughts most of the time.