A green oasis in the driest desert on Earth, where it hasn't rained in centuries but the sky is the clearest on the planet. From San Pedro you head out to the Valle de la Luna to watch sunset paint the dunes red, to the Tatio geysers steaming at dawn, and to high-altitude lagoons tinged with flamingos. At night, the telescopes reveal a Milky Way so sharp it looks fake. Earth, salt, and stars.