County : Meath
Newgrange is an outstanding monument with a whole host of features - effectively a large passage grave surrounded by a ring of stones, some stones with excellent carvings too. Inside there is an unequivocal astronomical alignment - the main passage is aligned such that only the midwinter sunrise illuminates the central chamber.

Newgrange has been the subject of enthusiastic 'renovation' by
the Irish office of public works - whether these are exactly to
your taste is up to you.
Certainly it is striking to see strong
architectural lines imposed upon the structure - while accepting
that the surface of the barrow was probably faced with white
quartz I am not so sure that the magnificent 20th century facade
is entirely true to form. I find something appealing about the
view from the back (smaller picture, right) of the
monument which has been left more in its state as originally
found.
The enthusiasm of the renovation is also shown by the
archaeological study - no minimalist principles of least affect
here - Newgrange was taken apart piece by piece and then
reconstructed. Sadly the central chamber, with its roof of
corbelled drystone construction, now leaks in heavy rainfall,
though for some 4,000 years the corbelled construction held the
weather at bay... Despite some of the crassness there, one of the
chamber's finest details was preserved.
A rock aperture in the
central chamber is aligned precisely with the long passageway so
that at the midwinter sunrise a long shaft of sunlight
illuminates the chamber - at no other sunrise is the chamber
illuminated.
The mound is surrounded with 'kerbstones' and some of these
are finely decorated in whorls and cup and ring marks on a much
grander scale than usual. The fine example to the left is the
stone located at the entrance to the chamber. Such rock-art is
also found at nearby Knowth, - the next photo shows similar
detail there.