Three main landform features found in upper teesdale?

The three main landform features found in Upper Teesdale are:

1. River Tees: The River Tees is the main watercourse in Upper Teesdale. It rises in the Pennine Hills and flows through the dale before joining the North Sea at Middlesbrough. The river has created a deep valley with steep sides, known as the Tees Gorge.

2. Moorland: The moorland in Upper Teesdale is characterized by its heather-covered hills and peat bogs. The moorland is home to a variety of wildlife, including grouse, black sheep, and wild ponies.

3. Hills and Mountains: The hills and mountains in Upper Teesdale include Whernside, the highest point in the Yorkshire Dales National Park, and Pen-y-ghent, another popular walking destination. The hills and mountains provide stunning views of the surrounding countryside.