Among Earth's 117 million lakes, only a rare few have grown large enough to be seen by human eyes from the edge of space — and fewer still hold their shape across the quarter-million miles to the Moon. These are not merely large bodies of water but the accumulated work of continental rifts, ancient seas, and retreating ice sheets measured in millions of years. From the Caspian's brackish expanse to Baikal's frozen winter glow, these lakes remind us that some features of our planet are legible not just to those who live beside them, but to anyone who has ever looked back at Earth from the dark.