The archeology of the area is also stunning and relics of every period of human occupation are to be found. The vortal tomb at Poulnabrone has yielded a date from a burial of 3800 BC, and is one of the most frequently visited monuments in the county. There are more than 60 wedge tombs recorded in the Burren, the densest concentration in the country. There are also numerous ecclesiastical sites. There are, apart from these obvious field monuments, features which are not so easy to see on the ground.
Aerial photographs reveal complex networks of mound walls.
These are the remnants of ancient landscapes, still visible here because the stony nature of the Burren upland never encoureged the use of the plough. In places there are a number of field systems, superimposed over one another, all overlain by the modern field walls. While it is unlikely that any wall still standing to a reasonable height will be more than a century or two old there can be no doubt that some of the modern walls follow lines laid down in prehistoric times. The area around Mullaghmore is widely recognised as one of the most floristically interesting and diverse parts of the Burren. The Irish Wildlife Service had plans to designate the area as a National Nature Reserve.