There are over seventy megalithic tombs in in The Burren, the most well known and most easily accessible being Poulnabrone. It was excavated in 1968 and found to contain the remains of "between 16 and 22 adults and 6 juveniles, including a newborn baby". Radiocarbon dating suggests that the burials took place 3800 and 3200 BC. The neolithic community would have been much larger than this and there are easier ways to bury the dead, so Poulnabrone is generally considered to contain the remains of special dead and to have been a center for ceremony and symbolism. It can get terribly crowded here, when I was there last June there were three full coach loads of people swarming around. Be patient and wait them out, they all tend to leave at once and be on roughly the same schedule. Over 90% of the tombs in The Burren are Wedge Tombs, so named for their wedge-shaped plan. They are narrower and lower towards the rear, with the broader side facing towards the setting sun. Evidence of late Bronze age inhabitants has been found in Gleninsheen townland, most importantly the golden Gleninsheen Collar. It was found by a farmer in 1932 and can be seen in the National Museum in Dublin. They have an amazing collection of gold objects there, and they have all been restored recently.