How have geographical features influenced the development of isolated cultural identities?

Throughout history, various geographical features such as mountains, deserts, and oceans have served as barriers that limit interaction between different groups of people. These natural obstacles can lead to the development of unique cultural identities as communities evolve independently. Examining regions like the mountainous Himalayas which separate different ethnic groups, or the vast Sahara Desert that has played a role in the cultural development of North African tribes, we can observe the impact of geography on culture. How do these physical barriers contribute to the distinct customs, languages, and traditions that emerge in isolated regions? Understanding this can shed light on the role of geography in shaping the diversity of human societies across the globe.