The east-west ridge containing points a, c, d and x represents the northern extent of the Cahuachi viewshed--points in the landscape intervisible
with Cahuachi's tallest pyramids.
The major secular power centre of Bamburgh lies just 8 km across the water from Holy Island, and the two are clearly intervisible
They are mostly, but not exclusively, found in Scotland, and the Crathes example lies very close to the 'hall' at Balbridie, just across the river Dee (but seemingly not intervisible
with it, as the viewshed analysis indicates: fig.
They may have been intervisible
during the Neolithic and they certainly seem to have been used for similar purposes at about the same time.
Human colonisation of the Pacific began in the far west of Near Oceania, at least 40 000 years ago (Allen & Gosden 1991; Leavesley & Chappell 2004; Wickler & Spriggs 1988) and progressed as far as the end of the Solomons chain along a route of mostly intervisible
As Dunnell (1999: 247) observes, the waste model of cultural elaboration is not inconsistent with others which might also have been operating in such circumstances, including competitive signalling between intervisible
communities, or the creation of monumental structures for ritual purposes.
5 km from the Great Plaza and set upon elevations high enough to be intervisible with activities on the top of the largest pyramid, Structure 1, in the absence of hilltop forest growth (FIGURE 1).
LME, LMW and LMS are PP2s, but are exceptionally placed on the very highest hilltops, intervisible with the Great Plaza pyramids.
A viewshed GIS showed that both groups were intervisible
with the top of the main pyramid, Structure 1, on the Great Plaza: in the case of LME a narrow corridor of vision led directly to the stela (FIGURE 2).
By my calculations, six cairns face points within 8 [degrees] of the passage tomb site at Fourknocks, which, unlike Newgrange, is intervisible