St. Petersburg is not in vain called the Northern Venice - there are many rivers, canals and other water bodies here. Of course, as the bridges in abundance: about 800, of which about 10 razvodnyh. During the navigation period at night, approximately from 01.00 to 5.00, they are bred: parts of the structure go up to give the opportunity to pass the vessels. This beautiful sight became a symbol of the city, and many tourists come to the city during the White Nights to admire them.

Bridging begins in the second half of April and lasts until mid-November, sometimes until the end of the month. The dates for the beginning of the summer navigation season are different each year. In 2011 it was the period from April 30 to November 15. When they start building bridges in 2012, it is still unknown. Approximate dates are April 20-November 10, and in actual fact, how the weather will allow.