Sure, here are 10 places to visit in Istanbul:

1. Hagia Sophia: A historic and architectural marvel that was once a church, then a mosque, and now a museum.
2. Blue Mosque (Sultan Ahmed Mosque): An iconic mosque with stunning blue tiles and impressive domes.
3. Topkapi Palace: Former residence of Ottoman Sultans, now a museum showcasing their opulent lifestyle.
4. Grand Bazaar: One of the world's oldest and largest covered markets, perfect for shopping and experiencing local culture.
5. Bosphorus Cruise: Take a boat tour to enjoy breathtaking views of the Bosphorus strait and the city's skyline.
6. Basilica Cistern: An underground ancient water reservoir with beautiful columns and an eerie atmosphere.
7. Spice Bazaar (Egyptian Bazaar): A vibrant market offering a variety of spices, Turkish delights, and other goods.
8. Dolmabahçe Palace: Another splendid palace with a mix of Ottoman and European architectural styles.
9. Galata Tower: An iconic medieval tower providing panoramic views of Istanbul.
10. Maiden's Tower (Kız Kulesi): A historical tower located on a small islet in the Bosphorus, with a fascinating legend.

Enjoy your visit to Istanbul!