Carsington Water is a man-made reservoir, flooded in 1990, and is a superb centre for water sports and for walkers. It is only 2½ miles from the cottage.
http://www.carsingtonwater.com/

Kedleston Hall is a major National Trust property. It is about 14 miles from the cottage.
http://www.nationaltrust.org.uk/main/w-vh/w-visits/w-findaplace/w-kedlestonhall/

Hardwick Hall, another National Trust Property is 21 miles away. This year marks the 400th anniversary of Bess's death.
http://www.nationaltrust.org.uk/main/w-vh/w-visits/w-findaplace/w-hardwickhall/
http://www.elizabethan-era.org.uk/bess-of-hardwick.htm

Chatsworth House, one of Britain's most famous stately homes, is just 14 miles from the Coach House.
http://www.chatsworth.org/

Haddon Hall is a 12th century manor house, about 9 miles from the cottage.
http://www.haddonhall.co.uk/

Ecclesbourne Valley Railway, opened in March 2008 as a pleasure/passenger service. The station is at Wirksworth just milesfrom the Coach House.
http://www.e-v-r.com/

Peak District website is the official website for the area and covers just about everything!
http://www.visitpeakdistrict.com/