Canal de Castilla Rey (Palencia), considered the beginning of the Northern Branch, Valladolid and Medina de Rioseco, lying at the end of the Southern Branch and Campos Branch respectively. The countryside crossed by the canal is of interest for its birdlife. In the Tierra de Campos there are two large Special Protection Areas ("La Nava-Campos Norte" and "La Nava-Campos Sur") which are notable for the birds such as great bustards ("Otis tarda") which live in the dryland farming areas (sometimes described as "steppes") which are typical of the region. The canal, on the other hand, provides habitats for wetland birds such as the
Great and Little Kimble in the cold weather, at the foot of the Chiltern Hills." Griffin House School, formerly Ladymede School, an independent co-educational school, is located in Little Kimble. It has a capacity of just over 100 day students from ages 3–11. The main A4010 road runs through Great and Little Kimble, as does the Chiltern railway line between Aylesbury and Princes Risborough. Where the main road meets the railway is Little Kimble railway station, which has been in operation since 1872, although the station buildings are now a private dwelling. There is a level crossing at Marsh. Great and Little Kimble Great