If you feel like you must visit Istanbul, we don’t recommend you be adventurous. The bright and safe thing to do is hire a professional Tour guide through a Travel Agent for the day. Even better, book your daily excursions and sightseeing tours via a Travel agent, where you can join small groups. Local Tour Operators and Travel agencies are very good at providing efficient and friendly top-quality service with qualified Tour Guides.
Getting to know Istanbul without doing sightseeing tours is impossible, which will give you a great deal of knowledge about its existence.