Turkey’s leading contemporary arts gallery, İstanbul Modern, is housed in a revamped warehouse on the edge of the Bosphorus, just in front of the Nusretiye Camii. The interior is all big, blank white walls and exposed ventilation pipes, with picture windows giving views across the Bosphorus to the Topkapı Palace. The collection includes the best of modern Turkish art, as well as some intriguing video installations from foreign artists. There’s a reference library, a cinema showing arts and independent movies, and a trendy café with a terrace overlooking the Bosphorus.