Check out Tallinn's Skyline at Patkuli Viewing Platform
Patkuli Viewing Platform is where the true beauty of Tallinn really shines. From this viewpoint, you will be able to see not only the beautiful vibrant roofs of Tallinn's houses but also all the old medieval stone towers, walls, and the spire of St Olaf's church all at once which is quite a sight to behold.
To get to the viewpoint, you can either walk up the 157 steps from the bottom of the cliff via Patkuli Stairs or you can take the more scenic route around and through the Old Town which should take you through some of the most beautiful attractions in Tallinn. There is no closing time at the viewpoint as it is simply a platform along the cobblestone street right by the cliff. Plus, there is no entrance fee whatsoever so you can visit any time you like.