The Landwehrkanal was completed in 1850 after five years of construction. Designed by master landscape architect Lenné (also responsible for the Tiergarten and Pfaueninsel), the 12km canal was built on the orders of King Friedrich Wilhelm IV, who wished to link Berlin with a new industrial area in Köpenick. But the building of the canal was also part of a larger scheme—to fight the dramatic unemployment which plagued Prussia at the time. The canal is the perfect place for a Sunday afternoon stroll. Winding through the city, it is lined with trees and parks, and a cycle path follows its route. There are plenty of pleasant cafés along the way (particularly at Paul-Licke-Ufer) where you can stop for refreshments.