Ephesus is a must see whilst in Turkey. Lot's of walking, but well worth it. See the Terrace Houses, (houses of the rich) lot's of steps to climb, these houses date back to the 1st Century BC. Lots of Fresco's on the walls. The Library of Celsius is magnifecent., and impressive. Walking around you can see ruins such as clay pots., and clay pipes that they used way back then for running water into their homes. It can be quite crowded, so be prepared to be walking for a while.
After your tour you are taken to a carpet presentation where you can witness carpets being weaved.