Complex sentence: The land around Seat is full of steep mountains running down to the shore line of buttermere, some of the steepest and the most nice looking ones include High Crag, Fleetwith Pike, Haystacks and Red Pike.
Split into simpler sentences: The land around Seat is full of steep mountains running down to the shore line of Buttermere. Some of the steepest and the most nice looking ones include High Crag, Fleetwith Pike, Haystacks and Red Pike.