sentences:  An earlier explosive eruption, created the prominent tuff ring that is still clearly visible extending in an arc south of Sunderlands Road.Two much smaller craters were formed to the north west of the main cone.The smaller lies buried under Pigeon Mountain Road outside number 18, and the other forms 'Heights Park' - a private reserve for the owners of 29 - 41 Pigeon Mountain Road and 14 - 36 Prince Regent Drive and 33 - 39 Tyrian Close.