Earth's Cleanest Places Lake Vostok, Antarctica About four kilometers (2.5 miles) under a large area of ice in Antarctica, there's a lake named Lake Vostok. It covers 15,690 square kilometers (6,058 square miles) and is 800 meters (2,625 feet) deep in some places. Lake Vostok is prehistoric-millions of years old-but until 1956, no one even knew it existed. It's a fresh water lake, and it has been hidden from sunlight for 15 million years. What this means is that the water is some of the cleanest, purest water on Earth. Cape Grim, Australia We all know that air pollution is a problem all around the world, so where do you go if you want really clean air? Well, Cape Grim In Tasmania, Australia is probably the best idea. Cape Grim has some of the cleanest air on Earth. Cape Grim also has beautiful, clean water. Why is this? Windt Special winds called "The Roaring Fortles" cross the Southern Ocean, bringing with them wonderfully clean water and air. In fact, In Cape Grim, people are allowed to put rain water into bottles and sell it. That's how clean it is! Singapore The tiny Island of Singapore has a population of about 5.7 million people. It also has very strict rules about the way its people behave. Singapore is one of the cleanest cities on the planet because of these rules. People are not allowed to chew gum unless it's from a doctor, and all used chewing gum has to go in a trash can. That means that you don't find gum on the sidewalks. In fact, no one drops trash in the street. There are big fines for people who don't respect the rules, but most people are happy to keep their city clean and healthy