There's a lake that's a giant crater - Apparently.
Lake Vida, located in Antarctica, is a 14-kilometer-wide impact crater that formed around 40,000 years ago when a comet or asteroid struck the Earth's surface. The lake is filled with a layer of ice up to 20 meters thick, but beneath that, the water is stagnant and has been cut off from the outside environment for millions of years. This unique environment has created a unique ecosystem, with microorganisms that have adapted to the extreme conditions, making Lake Vida one of the most fascinating and remote places on Earth.