The Last Secrets: The Final Mysteries of Exploration

The author surveys early twentieth-century geographical discovery, recounting expeditions that opened Lhasa, mapped the Brahmaputra gorges, probed the Arctic and Antarctic, scaled peaks such as the Ruwenzori, Mount McKinley, and Everest, and reported on New Guinea and the holy cities of Islam. He combines narrative accounts, maps, and photographic plates to describe routes, hardships, and scientific findings, while reflecting that most grand geographical riddles have been solved and future work will involve detailed surveying and scientific study. He also flags a few lingering mysteries, notably desert and depression regions that still invite hazardous exploration.