One of the must seen highlights in Alanya is the medieval castle. It was built on the remnants of earlier Byzantine era and Roman era fortifications. After the area was pacified under the Ottoman Empire, the castle ceased to be purely defensive, and numerous villas were built inside the walls during the 19th century. Today the building is an open-air museum.

The castle is located 250 metres (820 ft) high on a rocky peninsula jutting into the Mediterranean Sea, which protects it from three sides and the entire castle complex covers approximately 10 hectares. The wall which surrounds the castle is 6.5 kilometres (4.0 mi) long and includes 140 towers. 400 different cisterns were built to serve the castle. In 2009, city officials filed to include Alanya Castle and Tersane as UNESCO World Heritage Sites, and they were named to the 2009 Tentative List.

You can reach the castle easy by taken a seat in the cable car which is located closed to Cleopatra beach, or you take a taxi. many of them are waiting behind the old harbour area where the street go up to the castle. to take a taxi would be the better option, because you will get the amazing view to downtown and the old harbour. I suggest to take a taxi the way up – explore the castle – and walk down by feet. 

In summertime, you will have +45° in Alanya, so i suggest to go there in late afternoon. In this way you will additional catch the millions of city lights and can stay there up for some nice dinner.