This is a detailed overlay of the Vulkaneifel and the Eifelmaare near Daun, Germany.
These vulcanic caldera lakes, called Maar, are located in the beatifull Eifel Montains, Germany. They are of vulcanic origin and very deep (200 feet and more). In some lakes you can swim, some are closed for watersports.
These twin circular lakes (large dark features) were formed simultaneously by the impact of an asteroidal pair which slammed into the planet approximately 290 million years ago. The lakes are located near the eastern shore of Hudson Bay within the Canadian Shield in a region of generally low relief in northern Quebec province. Notice that the larger western structure contains a ring of islands ...
The Steamship William G. Mather is a retired Great Lakes bulk freighter now restored as a maritime museum in Cleveland, Ohio, one of four in the Great Lakes region. She transported cargo such as ore, coal, stone, and grain to ports throughout the Great Lakes, and was nicknamed "The Ship That Built Cleveland" because Cleveland's steel mills were a frequent destination.