The cave of Andíparos on Andíparos Island lies about 160m deep into the slopes of Mount Ágios Ilías (400 steps). A vast chamber there, about 216m long by 203m wide and 18m high, is covered in a forest of stalactites resembling an underground cathedral. At Christmas in 1673, the French Ambassador to Constantinople had midnight mass celebrated there, attracting many people from the neighbouring islands. During the Romantic era the cave was visited by Byron and other artists.