What area of the world was still not mapped at the end of the age of exploration?

At the end of the Age of Exploration in the 17th century, significant portions of Africa, particularly the interior regions, remained largely unmapped. The dense jungles, vast deserts, and mountains posed challenges to explorers, leading to limited knowledge about the continent's geography and cultures. Additionally, parts of the Arctic and Antarctic regions were also largely unexplored and uncharted during this period.