What is unique about the geographical feature indicated by the arrow ?

The answer that I was looking for - Lake Manitou on the Manitou Island in Lake Huron is the “Largest Lake in a Lake” in the world . However , it also happens to be largest lake in the world on a freshwater island . Points granted for either answer .
Cracked by Deepu , Navpreet Singh , Shrey Goyal , Arun Hiregange , Rithwik , Hrishikesh Varma , Incognito , Anil Raghavan , Jyothi and Rohit Pisharoty .
Lake Manitou is the largest lake in a freshwater island in the world(Manitoulin Island which happens to be the largest island in a freshwater lake in the world).
The location indicated is Lake Manitou (about 104 km²) which is the largest lake in a freshwater island in the world.
It is situated within Manitoulin Island, Lake Huron.
Lake Manitou, on Manitoulin Island on Lake Huron (One of the great lakes), is the largest “lake in a lake” in the world.
Lake Manitou is the largest lake on Manitoulin Island in Canada. It is the largest lake on the largest freshwater island in the world. Since Manitoulin Island itself is in Lake Huron, Manitou qualifies as the largest “lake in a lake”.
This is the map of Manitoulin Island in Canada.And here the arrow points the Lake Manitou which have the unique distinction being the world’s largest lake on an island in fresh water located on the largest island in a lake in the world.[:)]
with thanks to Mssrs. Brin, Page and co.
Lake Manitou, largest lake in a freshwater island in the world (on the largest freshwater island in the world)
lake manitou- the largest lake in a freshwater island in the world.
lake manitou,the largest lake in the largest freshwater island
Lake Manitou (about 104 km²) is the largest lake in a freshwater island in the world
Lake Manitou on Manitou Island in Lake Huron. Manitou is the largest freshwater island and Lake Manitou is the largest “lake in a lake”, largest lake on an island in a lake.