Russian flags fly on sunny spring day in St Petersburg

Three huge flags mark Lakhta Tower anniversary in Russia

Deep-red sunset shines behind Lakhta Tower in St Petersburg, Russia

Skyscraper Lakhta Tower lights up for New Year's Day in St Petersburg, Russia

Beautiful sunset behind Lakhta tower in St Petersburg, Russia

Huge lightning bolt strikes the Lakhta tower during storm in St Petersburg, Russia

Skyscraper illuminated to mark Victory Day in St Petersburg, Russia

Plans unveiled for third Lakhta Tower in Saint Petersburg