Why were the Tigris and Euphrates considered exotic?

The Tigris and Euphrates rivers were considered exotic due to their unique geographical and cultural significance in ancient Mesopotamia. They were vital for agriculture, allowing for the development of one of the world's earliest civilizations, which thrived in an otherwise arid environment. Their unpredictable flooding patterns and the rich alluvial soil they provided contributed to a landscape that was both alluring and challenging for early settlers. Additionally, the rivers served as important trade routes, facilitating cultural exchanges between diverse societies.