Locals love sit near the White Tower, to enjoy its view as well as the view of the gulf, especially on a sunny day. If you get in the Tower and climb all the way up, the view of the city and the water is amazing.
The White Tower is for Thessaloniki what the Eiffel Tower is for Paris, so you understand that it is a must-see! It used to be a prison in the years of the Ottoman Empire and was called "Red Tower" for that reason. Today, it is a museum displaying Thessaloniki's history through the ages.