In the first album we will walk along the Fontanka from Anichkov Most (Anichkov Bridge) on Nevsky Prospect (Nevsky Avenue) to Letny Sad (Summer Garden).
There is Anichkov Most (Anichkov Bridge) on this picture. Behind it is Dvorets Beloselskikh-Belozerskikh (Beloselsky-Belozersky Palace).
Are you asking why it is not bright in the White Night? Who says that it has to be bright in the White Night? :)
It is bright when the sky is clear. However, the cloud was only on the one side of the sky. And it had gone soon.