Walking around Istanbul: Visits to the Grand Bazaar, Basilica Cistern, Museum of Archeology, Taksim Square, Galata Tower and Bridge, Theodosian Walls, Eyup Mosque, and an amusment park. Before and after the Pacha tour, we spent about a week wandering around Istanbul. Grand Bazaar: Largest covered market in the world. And,oddly enough, every shopkeeper's brother sells kilims. Basilica Cistern: ...was built by Justinian in 532 AD, and it is the largest surviving Byzantine cistern in Istanbul. Museum of Archeology: Artifacts from the Greek, Roman, and Byzantine civilizations ...overwhelming! A walk from Taksim square (the heart of modern Istanbul) to our hotel in the old quarter. Highlights are the Galata Tower overlooking the Galata Bridge that spans the Golden Horn. A walk along the ancient wall: In 412 the Roman emperorTheodosius II surrounded Constantinople with a wall that stretched 6.5 kilometers between the Sea of Marmara and the Golden Horn.