Finding the Galata Bridge on your first visit to Istanbul is like discovering the center of the universe, where dozens of cargo barges, huge water taxis and tourist cruise ships crisscross the golden Horn that flows under it in a never ending mish mass of maritime movement,  a constant flow of ocean vessels visible in the distance carrying oil and grain, sharing the narrow Bosphorus passage with naval ships of all sizes as they move from the Mediterranean through the Sea of Marmara to the Black Sea and back.