Pebble Beach On Donauinsel, located in Vienna, Austria, offers a unique beach experience along the banks of the Donauinsel (Danube Island). This pebble beach stretches along the river, providing a picturesque setting for beachgoers. The beach length allows for leisurely walks and relaxation while enjoying the scenic views of the river. The sand color may vary due to the presence of pebbles, creating a natural and rustic ambiance.