The Great Slave Lake in Canada, in the Northwest Territories, is over 2,000 feet deep, deepest in North America.
https://youtu.be/vZ8HQadZ__I?si=R6KkoIjOSezFUKKr
I have never heard of it. Learn something new every day!
And yes, the name seems a little odd but it’s named after a family named “Slavey”. Also kinda odd, but then lots of names are odd when you really think about it …