See Constantinople City Walls (by bus) :
Constantinople City Walls surrounds Istanbul to protect the Byzantine Empire. The first breach of the walls was by the Fourth Crusade in 1204, the second by the cannons and troops of Sultan Mehmed the Conqueror in 1453.
Drive-by Bus to Golden Horn :
As a natural and extremely secure harbor, the Golden Horn has played an important role in the development of Istanbul. The inlet separates the European shore into two. It is approximately 8 km long, and the widest part is the entrance from the Bosphorus. Two streams drain into this inlet at its far end.
Visit the Spice Bazaar (Egyptian Bazaar) :
The Spice Bazaar (known in Turkish as the Egyptian Bazaar) is one of Istanbul’s oldest markets and a time-honored symbol of the city. You can buy spices, nuts, dried fruits, baklava, and, of course, Turkish delight (lokum) in the traditional rose water as well as just about any flavoring you can think of.
Boat cruise on the Bosphorus :
An amazing cruise between the two continents Europe and Asia, along the Bosphorus by the Dolmabahce and Beylerbeyi Palaces, wooden villas and mansions up to the Rumeli Fortress.
The Rumeli Fortress (From The Sea) :
It took only four months to build this fifteenth-century castle and it has been standing for more than five centuries. Amazing facts about the Rumeli Fortress is the shape of the Rumeli Castle the name of Prophet Muhammad, which shares the same spelling with Mehmed (Ottoman sultan commissioned the castle) in Arabic.