Looks good! It must have taken awhile seeing how many mountains there are!

Question though, on the bottom right side of the map there is a lake (at least I think it is a lake. It could be a hole straight through the world though for all I know ) that stands out a bit more than the others. Is this simply cliffs on the edges or is there something else there? Also, if it is a lake with cliffs, it seems a bit weird how the river interacts with it. I would have expected the river to turn into it since it looks a bit lower than the river.
Please let me know though if I am misinterpreting this though.