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such as St.Petersburg.
First, we'd like to tell you everuthing about
"city on the Neva".
the city is located on the north of country.
The most unique thing about St.Petersburg is white nights.
а вот насчет последнего предложения, лучше замени его.

Russia is our native country WITH unique cities such As St. Petersburg. Our project is about St. Petersburg. FirstLY, we'd like to tell you EVERYTHING about ITS geographical pecularities. The CITY is on the Neva River, (due to it's other name of St. Petersburg is the "city on Neva".?) The city is IN the north-WEST of the RUSSIAN FEDERATION. ITS area is 606 SQUARE kilometres. It covers 47 islands of THE NevA delta. Vasilyevky and Petrograd ISLES are THE biggest ONES. ITS ANOTHER importanT FEATURE is the SO CALLED white nights. They TAKE PLACE DUE to the high-altitude LOCATION of THE city.

which haS, tell you evering about, is situated on the banks of the Neva, it is in the north,606 square kilometres, It consists of 47 islands of the Neva,are the biggest of them,One more important thing about SP is, of the city

such AS, to tell you EVERYTHING about, вместо due to - because of it, The city is IN the North, square kiloetres, are THE biggest
importanT Factis...,high-LATITUDE POSITION...