Huge perforated rock formations that are towering at 80 meters high. There’s no easy road to get close to them, unless you walk for more than an hour and a half from the abandoned village of Efthimo. Only rock climbers will be able to manage to reach them and enjoy them up close. The Astrean rock formations are located 15 kilometers to the north of Iasmos, and they are set up in three distinct rows, resembling the famous Meteora in Kalambaka. The rocks are the exact same material (psammite), but the ones in Astrea are more corroded. Various kinds of vultures that can be found there have their main ecosystem in Dadia Forest.