Aydın (pronounced [ˈajdɯn]; eye-din; formerly named Güzelhisar and Tralles) is a city in and the seat of Aydın Province in Turkey's Aegean Region. The city is located at the heart of the lower valley of Büyük Menderes River (ancient Meander River) at a commanding position for the region extending from the uplands of the valley down to the seacoast. Its population was 207554 in 2014. Aydın city is located along a region which was famous for its fertility and productivity since ancient times. Figs remain the province's best-known crop, although other agricultural products are also grown intensively and the city has some light industry.
At the crossroads of a busy transport network of several types, a six-lane motorway connects Aydın to İzmir, Turkey's second port, in less than an hour, and in still less time to the international Adnan Menderes Airport, located along the road between the two cities. A smaller airport, namely Aydın Airport, is located a few kilometers in the South-East of Aydın. The region of Aydın also pioneered the introduction of railways into Turkey in the 19th century and still has the densest railroad network.
Tralles is an irregular lunar crater that is attached to the northwestern rim of the much larger crater Cleomedes, in the northeastern part of the Moon. Within one crater diameter to the northwest is Debes.
This is an oddly shaped crater formation with an irregular perimeter. The rugged interior has the appearance of three overlapping craters, with one at the south end, a second to the northeast and a third to the northwest. There are also several tiny craterlets located within the jumbled inner surface.
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Tralles.
The Trallians (Greek: "Τράλλεις", Tralleis) were an Illyrian or Thracian tribe. They were barbarians, employed as mercenaries, executioners and torturers in Asia.
Strabo in Geographica attributed the foundation of the ancient city of Tralles, in the valley of the Maeander River in Asia Minor to Trallians and Argives.