There is a multi-story parking structure as you drive into Piran. You need to park here, then either walk into town, or take the free shuttle bus from the ground floor. The shuttle bus drops you virtually outside the door of Hotel Tartini.
The front desk will charge you EUR 6 for a parking ticket to get out of the car park - cheaper than paying at the car park. I think they also have a valet parking system, but we had rented a stupidly large van, so we could/did not use it.
The hotel says "Guests can drive with their car undisturbed to the hotel on the Tartini square. You can leave the vehicle for a short moment near the hotel at the entrance to the Tartini square." But we were stopped at the entrance to the town and told to go back to the car park. Perhaps if we had confirmed reservation it would have been different.
Our rooms had a sort of view of the water, but we weren't in the room that much. And there is a deck where you can relax and soak in the view.
There is Free wifi in the hotel, but BEWARE. You only get one hour of free wifi per computer - I'm not sure if the clock starts ticking when you first log on or if it remembers when you log out.
The bathroom shower had a cheapish feel to it, but nothing to worry about.
The town is cute. We were told to avoid the seafood restaurants on the south side of the peninsular. However, the food looked fine, and we ate at one of the restaurants further along the street. We weren't cajoled to come in - a marketing gimmick we hate - the food was pretty good. I had fish, and the others had pasta with truffles which they said was excellent. The service was very good - no, superb - enough attention without being in the way.
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