Heringsdorf is a municipality and a popular seaside resort town on Usedom Island in Western Pomerania, Germany. It is also known by the name Kaiserbad (English: Imperial Spa).
The municipality was formed in January 2005 out of the former municipalities of Heringsdorf, Ahlbeck and Bansin. Until January 2006, the municipality was called Dreikaiserbäder, literally meaning Three Imperial Spas, a reference to several vacation visits of the German emperor Wilhelm II until 1918.
For the same reason, the fine sandy beach stretching about 12 km (7.5 miles) from Bansin over Heringsdorf to Ahlbeck and Swinemünde (nowadays a Polish spa), is also called Kaiserstrand (Imperial Beach). The continuous Baltic Sea beach of Usedom Island has an overall length of exactly 40 km (25 miles) and an average width of 40 m (130 feet), making it the longest sandy beach in Europe.Tourism is the dominant economical sector of the Imperial Spas, with an increasing number of hotels and vacation homes every year.