Sopot is a seaside resort city in Pomerelia on the southern coast of the Baltic Sea in northern Poland, with a population of approximately 40,000. It is located in Pomeranian Voivodeship, and has the status of the county, being the smallest city in Poland to do so. It lies between the larger cities of Gdańsk to the southeast and Gdynia to the northwest. The three cities together make up the metropolitan area of Tricity.
Sopot is a major health-spa and tourist resort destination. It has the longest wooden pier in Europe, at 515.5 metres, stretching out into the Bay of Gdańsk. The city is also famous for its Sopot International Song Festival, the largest such event in Europe after the Eurovision Song Contest. Among its other attractions is a fountain of bromide spring water, known as the "inhalation mushroom".
Wikipedia https://en.wikipedia.org/wiki/Sopot
Coordinates 54°26'41.252" N 18°34'6.565" E