Where did Henry Stanley explore in central Africa?

Henry Stanley explored various regions of central Africa, notably the Congo River basin. He is well-known for his expeditions to find the missing missionary and explorer David Livingstone in the 1870s. Stanley's journey ultimately led to the establishment of trade routes and the intense exploration of the Congo, which later played a significant role in European colonization efforts in Africa. His explorations significantly contributed to Western knowledge of central Africa during that period.