Simplify the following text for a Grade 5 native English-speaking person.
Original: Rostock is located on the Warnow river ; the quarter of WarnemÃ 1\/4 nde 12 km north of the city center lies directly on the coast of the Baltic Sea .
Simplified: A district of the city , WarnemÃ 1\/4 nde , is famous for its long beaches .