Professional diver Andrew Ryzebol tells PEOPLE exclusively of his risky underwater explorations 200 feet beneath uncharted ice with nothing but a mask and fins Ontario Freedivers Remember as a kid ...

Pushing and pulling with hands, knees, heels, and the tips of my swim fins, I shimmy through ... miles of the coast, we’ll dive through it, down as deep as 230 feet. (Read more: Get an Amazing ...

Ryzebol details some of the most fascinating discoveries he's uncovered during his deep dive excursions ... 200-plus feet into uncharted, freezing waters with nothing but a mask and fins.

The Ontario native carves a hole into a thick sheet of ice that's formed atop Great Lake and dives down 200-plus feet into uncharted, freezing waters with nothing but a mask and fins. A wetsuit ...