There's a floating lake larger than Earth? Yes, you heard it right. Deep within the Orion Nebula, about 1,300 light years away, lies a vast cosmic cloud known as the Waterfall Nebula. Hidden within this stellar nursery is a massive lake of water vapor, and it contains three times the amount of water found in all of Earth's oceans combined. Imagine swimming in space if only we could figure out a way to get there.