Istanbul is often considered as a place with deep history and cultural heritage. Istanbul takes you to the Ottoman Era with the many heritage buildings and palaces lying in every corner of the city. Walking about Topkapı or Dolmabahçe Palaces takes you through the time when Istanbul used to be a powerful country ruled by mighty emperors. Sultanahmet is the centre of the old city and a place you must definitely visit on your trip to Istanbul. The Blue Mosque, Grand Bazaar, Hagia Sophia are some of the most unique and important attractions that make Istanbul a place to visit before you die.