A few steps from the Rathaus Platz is Alster Lake, where visitors can take boat trips for some gorgeous vistas of the city and the surrounding greenery. Jogging tracks and sunbathing areas line the lakeside and in the winters, the lake can sometimes even freeze over. The last time this happened was in 2012.Places to visit around HamburgWadden Sea National Park on Germany's northwestern coast is a popular day-trip from Hamburg. Ferries run from Landungsbrücken, all the way to the island of Neuwerk in the North Sea (5 hrs). Also, the cities of Bremen and Hanover are both just over an hour away from Hamburg.