The most romantic Italian restaurant set inside a cave is placed in the town of Polignano a Mare in Southern Italy (province of Bari, Apulia). You can have unique dining experience at the GrottaPalazzese hotel, in its amazing restaurant which is open during summer months only. Restaurant is situated inside a vaulted limestone cave, looking outwards toward the sea. The interior decor, if we can say it like that, is relatively simple, so it allows enjoying beside in your dinner, in magnificent view of surrounding where Adriatic Sea has central part. At night you can experience unique light decor on each table which brings main accent of texture of cave walls.
In one short sentence, everything seems to be perfect there.