These are two views of Berlin, rendered inversely to one another. The prospect parallel to the gutter of the sketchbook shows the Schloss, taken from a vantage point close to the Zeughaus (Old Arsenal). Also visible is the Schlossbrücke crossing the River Spree.
The other sketch is a view along the Unter den Linden, a boulevard lined with double rows of lime and horse chestnut tress. Turner took this view from the corner of the Zeughaus looking westwards.
For other sketches of Berlin see Tate D21045–D31082; Turner Bequest CCCVII 13a–32.