Following his withdrawal from Cambridge due to health reasons, Galton embarked on a period of travel across Europe, seeking to improve his well-being and broaden his horizons. He visited various countries, experiencing different cultures and environments.

Galton's most significant expedition was his journey to Southwest Africa (present-day Namibia and Angola). He meticulously charted previously unexplored regions, studied the indigenous populations (particularly the Damara and Nama people), and collected valuable geographical, botanical, and anthropological data. This expedition earned him recognition from the Royal Geographical Society.

Galton published an account of his Southwest African expedition, solidifying his reputation as an explorer and geographer. The book was well-received and provided valuable insights into the region's geography, inhabitants, and natural resources. It also showcased Galton's skills in observation, data collection, and scientific analysis.