Buttermere is the Lake District at it's finest. It has some of the best walks in the National Park including the ascent of Haystacks, the favourite of the greatest fell walker of them all, Alfred Wainwright.
There is only one true lake in the Lake District (Bassenthwaite); the rest are meres and tarns. Reservoirs such as Thirlmere, Haweswater and Kentmere sit effortlessly in the landscape alongside their naturally formed cousins.
The Lake District is arguably at it's finest during the autumn when the shortening days and cooler temperatures give rise to a blanket of red, orange and gold as the trees prepare themselves for winter.
Still conditions in Lakeland can produce glass like reflections on the lakes. Rising early will give you the best chance to enjoy one of the most spectacular sights that the Lake District has to offer.