Flathead Lake, Montana: Because of the crystal-clear water, Flathead Lake in Montana seems shallow, but in reality is 370 feet in depth...Wow! .... ok...i am just pinning this because i am currently on a holiday in FLATHEAD LAKE MONTANA!!!! MIND BLOWN!!!
Hidden Beach, Marieta Islands, Mexico - a paradise for snorkelers, scuba divers, and nature lovers, because the crystal clear waters make it easy to see the humpback whales, sea turtles, dolphins, and colorful fish that congregate here.