What is the landscape like in upper course of River Thames?

In its upper course, the River Thames flows through the Cotswold Hills, an area of rolling hills, limestone valleys, and picturesque villages. The landscape is characterized by lush green meadows, gently sloping hills, and winding country lanes. The river itself is narrow and shallow, with occasional rapids and small waterfalls. The banks of the river are often lined with trees, creating a tranquil and idyllic atmosphere. The upper course of the Thames is home to a variety of wildlife, including otters, kingfishers, and herons.