Although now all in a ruinous state, at the time of construction the Medway Megaliths would have been some of the largest and most visually imposing Early Neolithic funerary monuments in Britain. Grouped along the River Medway as it cuts through the North Downs, they constitute the most southeasterly group of megalithic monuments in the British Isles, and the only megalithic group in eastern England. The Medway Megaliths can be divided into two clusters between and apart: one to the west of the River Medway and the other on Blue Bell Hill to the east. Addington Long Barrow is part of the western group, which also includes Coldrum Long Barrow and Chestnuts Long Barrow. The eastern group consists of Smythe's Megalith, Kit's Coty House, and Little Kit's Coty House, while various stones on the eastern side of the river, most notably the Coffin Stone and White Horse Stone, may also have been parts of such structures. It is not known if they were all built at the same time, or whether they were constructed in succession; nor is it known if they each served the same function or whether there was a hierarchy in their usage.