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Trethevy Quoit Trethevy Quoit is considered a meg alithic structure and is located in Cornwall. The site is owned and managed by t he Cornwall Heritage Trust. The stones are about two kilometres from other monuments such as The Hurlers, The Pipers, Craddock Moor stone circle, and Rillaton Barrow. Coordinates 50.493181,-4.455449 Description The structure is made up of six stone slabs. One slab caps the others and has a hole to one side. Another small, rectangular stone is considered the seventh stone and entrance stone that can be moved for access. It has been suggested that the stones were covered, which would be quite normal for a building used as a gnomon. The purpose would be to eliminate excess light and could have been used during the day. Treth evy Quoit is located on a slightly raised area surrounded by seven hills. The average elevation of the site is 221 metres. The gnomon was likely used for stargazing, aligning with a star or celestial object. Analysis The monum

Grey Wethers Grey Wethers are a pair of prehistoric stone circles located on Dartmoor in Devon. Some archaeology was performed in 1898 along with some restoration of the stones. There is some folklore connected with the stones. Coordinates 50.631984,-3.926117 Description The circles are 32 and 33 metres wide, respectively. The northern circle contains 20 stones on its circumference, and the southern circle contains 29 stones. They align north/south at maximum tilt. Northern 20 stones 4122 32 metres Southern 29 stones 131 33 metres Analysis If pairing off stones vertically and horizontally, then some stones don't align. These stones can be read clockwise as 4122 (northern circle) and 131 (southern circle). 4122 ÷ 131 = 31.465 The difference in width could give two dates suggesting they were built within that time. Another possibility is multiplying the numbers and dividing by the number of seconds in an hour to produce 150. Using this as an angle from the west, 60

Fernworthy Stone Circle Fernworthy Stone Circle is located in Dartmoor National Park in Devon. The circle is thought to be from the Bronze Age. There are several other stones that lead away from the site and could possibly be connected, with several stone cairns located nearby in the woods. Coordinates 50.641163,-3.903817 Description The circle is 60 feet in diameter and contains 29 granite stones. 27 stones are visible, and 2 are mostly buried. One of these two could be considered a marker or pointer and aligns at 80° northeast to a dip in the circle. Analysis From the stone marker to the dip in the circle's circumference aligns best at 80° toward the northeast. When using this angle and aligning the stones, the following are produced: The number 1 is used for no alignment and 2 for an alignment. Clockwise 80° 12111111112211111111122 Anti clockwise 80° 2121121122111111112211 Unlike other stone circles, a pattern or calculation is usually produced, and when using 11 or

T emple of Poseidon The Temple of Poseidon is located  on Cape Sounion, Greece, and is dedicated to the god Poseidon. The temple is thought to date from between 700 and 440 BCE. The god Poseidon is commonly perceived as carrying a  trident and  presiding over the sea.  He is one of the twelve Olympians in ancient Greek religion and mythology. Coordinates 37.650179,24.024523 Description The average elevation for the area is 60 metres because of the incline, with the average temple base height of 64.6 metres and 62.9 metres for the base around the temple. The temple currently appears as having 9 by 6 pillars but illustrations show a temple of 13 by 6 pillars originally. The temple faces southeast at an angle of 14° and when it was built would have faced 3.76°/4.16° less. (72° northeast) 3.76° for 440 BCE 4.16° for 700 BCE This angle toward the southeast would have been 10.24° or 9.84°. (The Parthenon in Athens has a similar angle of 3.77° less when constructed.) Measurements The outer ba

Le dolmen de la Table des Marchands The dolmen of the Table des Marchands is a tomb located in Locmariaquer, Brittany, France. Along with the Er-Grah tumulus and the Broken Menhir of Er Grah, they are the Locmariaquer megaliths. The Er-Grah tumulus is a cairn. The Broken Menhir of Er Grah refers to the broken menhir (which no longer stands) but includes what is thought to be a row of menhirs replaced by small local stones. Coordinates 47.571636,-2.949732 Description The tomb and cairn are located on an outcrop on the mainland at almost the same latitude as Gravinis and about 4 kilometers east. The tomb's entrance is at a 45° angle toward the southeast and is built from the same stone as the Er-Grah tumulus. It is a two-layer structure and roughly circular. One layer is 20 metres and the other 29 metres wide, and 15 metres and 23 metres long, respectively. Analysis Taking the difference in coordinates between the two sites as, Latitude 0.000255 Longitude 0.05 it can t

Foel Drygarn Hill Fort Foel Drygarn Hill Fort is located in Pembrokeshire, Wales. Its name means "The hill of the three cairns" and is considered an Iron Age hillfort with three Bronze Age cairns. Two kilometers to the west is Carn Goedog on the Preseli Hills with Carn Bica, and four kilometers to the southwest is the Gors Fawr Stone Circle. Coordinates 51.970166,-4.683347 Other monuments in the area Morganna Standing Stone 51.950550,-4.609143 About ten kilometers to the southeast. Pentre Ifan Burial Chamber 51.998964,-4.770052 About ten kilometers to the northwest. Waun Mawn Standing Stones 51.970930,-4.792074 About eight kilometers to the west. Description Foel Drygarn Hill Fort is at an altitude of 363 meters, and although it is on its own hill, it is not the highest monument in the area. The hillfort and cairns appear to be mostly composed of small, randomly placed rocks. It is angled 27° toward the northeast and is about 300 meters at its widest point,

Gorsedd Circle The Gorsedd Cir cle is a stone circle in Fishguard, Wa les. T he Gorsedd Stone s are a Welsh tradition of modern stone circles constructed for the National Eisteddfod of Wales. These stone circles can be found at several locations, including Ab erdare Park and A nglesey. They are typically 20 meters wide and have 12 stones on the circumference with a level stone in the circle. A further stone is usually set back from the circumference, the central stone is called the Logan Stone. Coordinates 51.996431,-4.975040 Stone Circle  Gorsedd Circle is a typical stone circle but has 13 stones on the circumference with one inset. It was erected in 1936 and has the names of the parishes inscribed on each stone. Ceremony  During the opening ceremony, the Archdruid stands on the Logan Stone facing the Stone of the Covenant. Two stones mark the entrance and are called the Portal Stones. These mar k the midsummer and midwinter sunrises. Gorsedd Circle  (no edit) Archeology77 ©