The Baltic Sea is creates Poland's northern border. The coastline is 788 km long and is the most visited region by Polish tourists in Poland. The Baltic coast is not only the roar of the sea, sandy beaches (where you can often find amber pieces), picturesque cliffs, but also its many historical towns and fishing villages.The following holiday sea resorts attract an abundance of tourists: Swinoujscie, Miedzyzdroje, Rewal, Niechorze,Mrzezyno, Dzwirzyno, Kolobrzeg, Ustronie Morskie,Sarbinowo, Mielno, Dabki and Darlowo. Many historical monuments are also worth visiting, the most famous being in Kamienie Pomorskie, Stargard Szczecinski, Kolobrzeg and Szczecin. When visiting the region, it would be a pity to miss such interesting places as: kamienne kregi in the Grzybnica natural reserve near Koszalin, Jezioro Turkusowe (The turquoise lake) near Wapnica (near Miedzyzdroje), Jezioro Szmaragdowe (The Emerald Lake) near Szczecin, the church inTrzesacz, which looks as if it were sliding into the sea or the so called Szwajcaria Polczynska. You should also make a stop in Leba and its surroundings - the Slowinski National Park, which was entered as aUNESCO World Biosphere Reserve. The park is famous for its unique moving sand dunes, which, because of the wind, can move between 2 - 9.5 metres yearly.