Uddevalla is a town and the seat of Uddevalla Municipality in Västra Götaland County, Sweden. In 2010, it had a population of 31,212. It is located at a bay of the south-eastern part of Skagerrak. The beaches of Uddevalla are filled with seashells and Uddevalla has one of the largest shell-banks in the world.
Wikipedia

Sweden is a Scandinavian nation with thousands of coastal islands and inland lakes, along with vast boreal forests and glaciated mountains. Its principal cities, eastern capital Stockholm and southwestern Gothenburg and Malmö, are all coastal. Stockholm is built on 14 islands. It has more than 50 bridges, as well as the medieval old town, Gamla Stan, royal palaces and museums such as open-air Skansen.

Wikipedia