Dowth, which means ‘darkness’, is one of the 3 principle passage tombs of the Brú na Bóinne World Heritage Site (The other 2 being Newgrange and Knowth). It dates from c.2500 b.c and shares a solar alignment with neighboring Newgrange during the winter solstice and is also surprisingly of a similar size measuring 90 meters in diameter and 15 meters high. It is still surrounded by granite kerbstones which originally would have been covered in quartz, some of which are decorated with cup-marks, spirals, and flower-like designs. The mound was unprofessionally excavated in 1847 which left a large sunken depression on its summit however two passage tombs were discovered on the western side and a 14-meter passage that ends in a cruciform chamber was found on the north side. Several of the orthostats (stones) in the chamber are decorated with spirals, chevrons, lozenges, and circles. There is evidence to support that it was inhabited in the first few centuries a.d as a souterrain (underground storage area) was found on its western side. There is no public access into the passages and chambers but the site is free to explore and wonder.