View north from Södermalm where you can see two of the islets Stockholm is built on. To the left is City Hall, on Kungsholmen, to the right is Riddarholm Church, on Riddarholmen. In the middle is Norrmalm (which is not an islet) and Central Station. Right above the bow of the boat is a house with two round towers. The rightmost one was part of the city fortifications back in 1530.