You have likely seen these gorgeous clay based pebbles in the crystal clear waters of Lake McDonald, but New York Magazine just discovered them and posted this video.

If you've never had the opportunity to see this beautiful lake, it's almost 10 miles long and 500 feet deep and located in Glacier National Park. These pebbles and Lake McDonald are just a few of dozens of reasons that Glacier continues to see record attendance and expects to break another record in 2018.