Just a short drive from Midyat, Hasankeyf makes for a good half-day excursion. This small town has a magical setting, with stone houses on the banks of the Tigris River, lorded over by a cliff topped with the remains of an ancient citadel. One of the only places to cross this section of the Tigris is a now-ruined bridge that was built in 1116 by the Artukid ruler Fahreddin Karaaslan, possibly incorporating parts of a Roman bridge. Above it is a magnificent minaret—all that remains of the Artukid Great Mosque, which collapsed into the waters. Come, explore, have lunch at a string of casual fish restaurants on the banks of the Tigris (at some you can sit in ankle-deep water and enjoy a fish as its smaller relatives nibble at your toes) then return to Midyat, Mardin, Diyarbakır, or even Lake Van.