[rotifer]

From a bit later in the trip is a photo from the shore of Manicouagan Reservoir. According to Wikipedia [1], it's an annular lake formed about 214 million years ago by the impact of a meteor 5 km in diameter. It has an outer diameter of about 72 km, and it's "the Earth's sixth-largest confirmed impact crater according to rim-to-rim diameter", and one of the oldest known.

[1] https://en.wikipedia.org/wiki/Manicouagan_Reservoir

[VHRanger]

There are a few oddly shaped lakes in the inconceivably large northern part of Quebec.

One of my favorites is lake mistassini[1], an immense lake shaped like claw marks

1. https://en.wikipedia.org/wiki/Lake_Mistassini