Meteora, Greece, is an area in Thessaly (Central Greece) and Kalampaka is the city under the rock towers of Meteora. The thing that makes Meteora so special is the monasteries on the top of the rock towers.
The castles and the walls of Thessaloniki were created in ancient times, as it was necessary to fortify the city. It is believed that they date back to the founding of the city. The castles took their final form during the time of Theodosius the Great