Rest stops

Yes we have Petrol Stations with WCs on our Autopistas and Autovias, many open 24hrs, Repsol is the largest one. On the smaller country roads there are also roadside bars and restaurants that let you use the WC for something small like a cortado.

Carlos, thanks so much for the information! When we drove in Bavaria there were some rest stops and when we visited Italy for the first time we took public transport so didn't look into it. We've noticed here in the southeast US there are less and less rest stops so weren't sure about our travels in Andalucia.

No problem! Andalucia in general has benefited greatly from much infrastructure investment these past years, it used to be considered a bit of a backwater but now has the most high speed tack in Spain and very modern highways.

Ditto what Carlos said. No problem finding a WC on the main roads. Some smaller stations on rural roads don’t have the same facilities, but we’ve never had a problem finding one.

Edited: let’s just give all the different names I’ve seen used in Spain. Retrete, servicios, aseos, baño, toilet.

Are you planning to keep the car while you're in Sevilla? It may be unnecessary and more of a liability than an asset.

When driving through the hills, you can also stop at any town/village and go in a cafe. Order a cheap drink - coffee, tea, bottled water and you can use the toilet. BTW in Andalucia, it's called aseos.

Thanks everyone, so helpful! And Chani, I worded my question poorly. What we are doing is renting the car in Granada as we are leaving, staying in Ronda for 3 nights with plan to visit 1 or more other white villages, then driving the car to Sevilla where we will drop it off immediately. The rest of our time we are using buses and trains. Definitely one of the many things I've learned by being part of this forum!!