burren is bounded on the north by derrycassan and coologe townlands, on the west by killydrum and derryniggan townlands in county leitrim, on the south by raleagh townland in kildallan parish and lugnagon townland in county leitrim and on the east by kiltynaskellan and doogary townlands in kildallan parish. its chief geographical features are derrycassan lake, the shannon–erne waterway and several stone quarries. burren is traversed by a public road (which was made in 1913 by father peter brady) and several rural lanes. the townland covers 944 statute acres.