FunArtists Jimmy Cauty and Jem Finer have raised two standing stones, with a "modern ley line" between them. Inspired by this, I (Andy B) have built a 'Ley Line and Alignment Finder' which draws a straight line between any two of the Portal's 65,000-plus mapped sites and shows what sits along it. This is intended as a conceptual art project highlighting how we project modern thoughts onto ancient sites but it is for everyone to use however you wish. Here we look at a some classic alignments, then a how-to section so you can use the new tool to find your own conceptual 'ley lines' or alignments between any pair of sites of your choosing.
Image submitted by Andy B

Neolithic and Bronze AgeNear Roughfort on the far outskirts of the city of Belfast. It looks like it has been cleared of a lot of vegetation that previous visitors complained of. Also known as Granny’s Grave (a corruption of Grania’s Grave which is itself a translation of Carn Greine = Cairn of the Sun), an overgrown, low, megalithic passage still roofed, 9 metres long. At the south-western end of is a sealed polygonal chamber which is roofed by a single stone 1.8 metres across.
Image submitted by HamGarn

Iron Age and Later PrehistoryThe site of the only known crannog in Wales. A dug-out canoe found some 400 metres from the site and now in Brecon Museum (pics on our page) has been radio carbon dated to between 760 AD and 1020 AD suggesting an age for the site. There is a reconstructed crannog house created on an island some 70 metres from the original crannog which has display panels and a replica of the canoe.
Image submitted by GEdge

Neolithic and Bronze AgeA 1.4 metre tall standing stone on Cnoc a' Charragh (Hill of the Standing Stone) a remote, rocky location on the Isle of Colonsay. Just to the north lies another slab, 2 m by 0.8 m and at least 0.2 m thick. In 1923, S Grieve took it to be the cover of a long cist. This was examined and found to be empty. In 1984 RCAHMS thought it more likely a second, fallen standing stone. Creative Commons photo by Julian Paren,
Image submitted by Creative Commons

Neolithic and Bronze AgeA Langdysse (Long Barrow) with central burial chamber in Sorø
Image submitted by ShamrockStone

Neolithic and Bronze AgeAn absolutely lovely site and well worth the visit as part of the Clunie Path. When the Clachan an Diridh stone circle was built, it would have had magnificent views to the NE across the River Tummel to Ben Vrackie and the Grampians beyond, and to the SW down the River Tay.
Image submitted by dst

Neolithic and Bronze AgeFurther along the road to Ty-Lia allee couverte (see previous) after 100 yards a 5 foot standing stone is visible on the left. Walk through a gateway and the stone is under a tree, with three smaller stones nearby to the south on the other side of the tree and hedge.
Image submitted by bishop_pam

Neolithic and Bronze AgeA fairly complete allée couverte, well signposted and in a little grassy area on the island of Ile-Grande, just off the coast near Trebeurden. It is about 9 metres long by 1.5 metres wide, and oriented to 110°. There are two large capstones which cover most of the chamber.
Image submitted by DrewParsons

Neolithic and Bronze AgeWhat was originally a neolithic chamber is now bizarre in appearance, consisting of a capstone apparently delicately balanced on just two tall pointed supporting stones. Although difficult to reach, the effort required is worthwhile.
Image submitted by Bladup

Neolithic and Bronze AgeThe Long Rock takes some finding, concealed as it is (was?) by a small wood and a blanket of ferns. It is 2.4 meters long with a smooth face that used to lean towards the southeast and tapers slightly at the top.
Image submitted by FionaR

Multi-periodAn earthwork enclosure located on the summit of Doon Hill c. 350m NNW of Kildonnan Farm on the B7042 between Sandhead and Portpatrick in Dumfries and Galloway. The rectangular grassy mound measures approx 20m east-west by 17.5m north-south. It is protected by an earth rampart and outer ditch.
Image submitted by markj99

Neolithic and Bronze AgeDespite looking very difficult to get to on my maps, this lateral entry allée couverte to the southwest of Loguivy is actually very easy to find, as a new housing developement has been made, with the roads through it signposted to the allée couverte, and then a little trackway made up to it.
Image submitted by LeRoyBreizh

Early MedievalEarly Christian cross, round tower, rare medieval monastery complex, holy well, bullaun stone and rag tree. The monastery was founded by St Ciaran the Elder in the 5th century, which makes Saighir one of the earliest church/monastic sites in Ireland, older than Clonmacnoise and older than St. Patrick by the tradition that made Ciaran one of the pre-Patrician saints.
Image submitted by Anne T

Springs and Holy WellsThis must be the most unusual location for a holy well. The well is in the cave and only accessible at low tide. Water seeps from the multi-coloured rock and mothers formerly crossed the sands of Holywell Bay to immerse their ailing children in the healing water. Real pagan magic here with no obvious Christianisation.
Image submitted by TheCaptain

Roman, Greek and ClassicalThree semicircular apses open off a square central space, roofless now, the fill of the vaults showing where the tiles have gone. This was a Roman tomb, built in the fourth century for the owners of a wealthy villa whose remains lie scattered about a hundred metres away. The masonry is original: small blocks of tufa laid in courses, in the technique called opus vittatum, with brick used inside and tufa outside.
Image submitted by Anne T

Modern SitesThe experimental earthwork on Overton Down, its bank and ditch cut into the chalk in 1960 so that archaeologists could watch how such a structure weathers and settles. The posts along the crest belong to the monitoring. The point of the exercise was and is to dig sections through it at planned intervals over more than a century, and so measure decay against a known starting point rather than infer it. Photo credit: Wiltshire Heritage, (Creative Commons)
Image submitted by Creative Commons

Neolithic and Bronze AgetheCaptain writes: I thought I had seen some pretty impressive megalithic constructions before, but the Locmariaquer ones are making me think again. This is a massively long passage grave, built in at least two different ages, and much repaired/restored with slabs of concrete. We have many more pictures on our page, including some from the inside.
Image submitted by stonetracker

Neolithic and Bronze AgeNot far off the busy road between Morlaix and Roscoff, this Tee shaped allée couverte is apparently a very good example of the type, but it has become very overgrown and unloved, almost part of its surrounding field.
Image submitted by TheCaptain

Modern SitesAn impressive modern stone circle just north of Warrington with a henge, inner ring or cove of stones, solsticial (or near solsticial) alignments, outlying stones in direct alignment with the main circle, holed stones with possible astronomical alignments, a long barrow, sympathetic layout and planting of vegetation and more.
Image submitted by TimPrevett

Rock ArtThis page includes several sites of the Pecos River culture in the Seminole Canyon State Historical Park including Panther Cave, Fate Bell Shelter, Black Cave
Image submitted by Creative Commons