See top sites from the Byzantine and Ottoman empires on a full-day Istanbul tour with a knowledgeable guide. In the morning, walk between several UNESCO World Heritage-listed sites in the Sultanahmet district, including the Hagia Sophia, Blue Mosque and Hippodrome, then visit Caferaga Medresesi, a cultural center for Turkish music and arts. After lunch, take a coach to Topkapi Palace — an exquisite Ottoman palace complex. Finally, head to the Grand Bazaar — an enormous market that dates to the Byzantine era.