I've never seen in a city as many beautiful girls as in St Petersburg.
In Hotel lobbies, there are often wgs.
Few things among many other to do in this stunning city:
-Take an helicopter tour
-Go to bars try 90° Vodka, take Vodka for breakfast in coffee
-visit l'Hermitage and the city center
-Go North of the city in the wood landscape near the former Finland border.
And speaking about the Nevski Prospect, why not read the Nicolas Gogol novel before going there