The well-preserved architectural texture of the Dalyan and Köycegiz District centre, allows for a building plan in harmony with the natural and historical environment and is a successful application for the Special Environmental Preservation Corporation. Thanks to the wastewater purification plants of the two settlements, the aquatic ecosystem is protected from domestic waste pollution to a significant degree.
When the Ottoman Empire, despite its many victories was ultimately defeated in the first World War, the Moudros Treaty was unwillingly signed and the whole of Mugla Province was left to the Italian forces. Interested in the rich chrome deposits in Köycegiz and its vicinity, the Italians placed a small garrison in Köycegiz to control the region. Although in occupation, the Italians treated the locals and Ottoman officers fairly, (even turning a blind eye to the organisation of the National Forces), and quietly after the War of Independence.