The Roman province of Trakya (Thrace) is separated from the rest of Turkey by the Bosphorus, the Sea of Marmara and the Dardenelle Straits. Edirne, lying close to the borders of Greece and Bulgaria, is best known for the masterpieces of local architectMimar Sinan, with wonderful examples from the Ottoman Empire. The area is also famous for the lush rolling fields, filled with vineyards and sunflowers grown for their seeds and oil. The cities in this region are Balikesir, Bilecik, Bursa, Canakkale,Edirne, Istanbul, Kirklareli, Kocaeli, Sakarya,Tekirdag and Yalova.