Wind turbines and tanks in Oresund, Copenhagen, Prøvestenen Harbor. Prøvestenen, also known as Benzinøen, is an artificial island off the northeast coast of Amager in Copenhagen, Denmark. It was built in the second half of the 18th century as a sea fortress to guard the entrance to Copenhagen harbor and was used for military purposes until 1922. It is located near the Amager Hill waste incineration plant. Today it is home to the city's petroleum port.
