I SAW MDers on my trip To Madrid and Barcelona last year.
I eagerly chatted with them about the ins and outs of detecting there. The beaches, he explained, can sometimes be territory of MDers, and he expressed that you might get strong armed off a beach.
I’m sure you could detect quite a bit there, but I just wanted to share that since you asked.
I would ask around. I don't know what you're looking for so that makes a difference in who you talk to. Local knowledge make a bid difference Good luck.