[One] important commercial port on the Black Sea is Trabzon. As the beginning of Iran's transit road, it connections with the ports of the other countries on the shores of the Black Sea. The Trabzon Castle was founded on an area shaped like a table and the architecture which has grown up around the castle reflects Byzantine, Commagene and Ottoman styles. The most important structure in Trabzon is the Ayasofya Museum. The interior is decorated with frescoes and on the exterior are a number of reliefs. The panoramic birds-eye view of the city which can be had from Boztepe Park and the Ataturk Mansion are splendid indeed.