Toured the city of St.Petersburgh , Russia .
Travelled to St.Isaac's Cathedral , The church of the saviour on spilled Blood , Kazan Cathedral and The Narva Triumphal Arch.
You shouldn't visit the first two places on a Wednesday as these churches are closed on mid week. The rest are open to tourists .
Also while getting around in cabs use this app which is available on playstore called yandex Taxi.
It is cheap and is the best app to get a Cab anywhere in Russia .
Hope this helps