Dowth

Dowth (Irish: Dubhadh) is a Neolithic passage tomb located in the Boyne Valley, County Meath, Ireland that dates from about 2,500 – 2000 BC. It is the second oldest behind Newgrange^{[citation needed]} of the three principal tombs of the Brú na Bóinne World Heritage Site – a landscape of prehistoric monuments including the large passage-tombs of Dowth, Newgrange and Knowth). It is less developed as a tourist attraction than its neighbours, partly because the chamber is much lower, and partly because the decoration is poorer. It was partly excavated in 1847, though it was pillaged by Vikings and earlier looters long before that.

• http://en.wikipedia.org/wiki/Dowth