Swiss geologist Toni Hagen first came to Nepal in 1950, crisscrossed the mountains and plains on foot to find out the kind of rocks the country was made of. His detailed stratigraphic cross sections of Nepal for the first time gave us an idea of what lay beneath our feet.

Along the way he also took thousands of photographs and film which have been carefully archived by his family in Switzerland. Toni Hagen died in 2003, but the images represent a time capsule of the land and people, and show us the way we were.