2 Best Sights in Hasankeyf, The Black Sea Coast and Lake Van

Just below the citadel, on the way into town, is the Er Rizk Mosque, which dates back to the 14th century and has a beautiful minaret (topped by a stork's nest) that has intricate stone carvings on its exterior.

Across the river from the citadel is another spot worth visiting, Zeynelbey Türbesi, a mausoleum built for a prince who died in battle in 1473. The stylized structure has an onion-dome top and is decorated with still-vivid turquoise-color tiles set in calligraphy-like geometric patterns, more reminiscent of Iran and Central Asia than Turkey.