Copenhagen
Riga is the largest city in the Baltic states.
Memphis is the closest city to Heliopolis.
The closest city to Fort Greenville would be Greenville, Ohio.
The Baltic Sea is entirely surrounded by the countries of northern Europe: Sweden, Finland, Estonia, Latvia, Lithuania, Poland, Germany, and Denmark (and the Russian exclave of Kaliningrad).
The city of Rockhampton in Australia lies closest to the Tropic of Capricorn, running through the city and earning it the title of the "Tropic of Capricorn City."
Kalingrad
St Petersburg
St Petersburg and Kaliningrad
St. Petersburg is a Russian city on the Baltic Sea.
St Petersburg and Kaliningrad
Saint Petersburg
St Petersburg and the Conclave of Kaliningrad
Pskov is near the border with Estonia in the Baltic States. Smolensk is near the border with Belarus. Chelyabinsk and Omsk are near the border with Kazakhstan. Vladivostok, in the far west, is near the border with China and North Korea.
There is the Russian Enclave of Kaliningrad on rhe Baltic, and St Petersburg which is on the Gulf of Finland, a branch of the Baltic Sea
Peter the Great founded the city of Saint Petersburg which is now a Federal City on the Baltic sea. ( Saint Petersburg is on Russia)
Estonia Estonia is a country, not a capital city. The place you are looking for is St Petersburg
The Russian enclave is Kaliningrad