Atacama Desert, Chile

Atacama Desert, Chile, delivers the driest non-polar air on Earth at 2,400 metres elevation, a combination that yields over 300 crystal-clear nights annually. This extreme aridity and altitude reduce atmospheric interference, making it the premier stargazing spot on the planet and outperforming #4 Aoraki Mackenzie by offering nearly 50 more clear nights per year. The conditions are so exceptional that the European Southern Observatory and ALMA radio telescope have built major facilities here, confirming its unrivaled scientific value.