More than 300 years have gone since St. Petersburg was founded, and
more than 300 floods happened in the city. Snow melted, river was overflowing - and many times in pasr city was covered with water.
Nowadays you can still spot some of the flood signs which say to which height water have been rising and when. It's a bit of time machine. You walk from Starbucks with an iPhone in your hand... and boom! You're two centuries ago. Nearly drowning.