Giant's Ring

Northern Ireland has its own henge...you know, like Stonehenge.  Our's isn't as big nor as popular, but it is still pretty sweet.  It supposedly has been around since 2700 BCE and has been used for burials and tombs...as well as horse racing in the 18th century.  The megalithic tomb in the center of the henge seems to be the main event...

The henge itself isn't too visible in the pictures, but the rounded feeling that the grassy area seems to create in the second photo is indeed from the circular henge.