A Standing Stone at Night. Shutterstock.

3 Puzzling Ancient Standing Stone Monuments on Earth

More than 50,000 ancient, standing stone monuments exist in Western Europe Alone. Their purpose? A massive mystery.


What are some of the most puzzling ancient standing stone monuments on Earth? Let us take a look.

The word Menhir originates from Brittonic languages and signifies “MenStone and “Hirlong. Essentially, Menhirs are long stones. Archaeologically speaking, we see Menhirs as large human-made upright standing stones.


These ancient monuments can be found as either monoliths –singular standing stones– or as part of a group of similar stones. Standing stones come in all shapes and sizes and can differ considerably. Their existence has been well documented across Europe, Africa, and Asia. However, they are most numerous in Western Europe. If we look at Ireland, Great Britain, Brittany, and France, we will find over 50,000 examples of ancient standing stones.

Most Puzzling Ancient Standing Stone Monuments

Ales Stenar Standing Stones in Sweden. Shutterstock.

There are thought to be more than 1,200 standing stones in France alone. And since we can’t really radiocarbon date stones, finding out how old some stones are is challenging. Luckily, pottery fragments discovered beneath some of the massive standing stones suggest certain Menhirs can be traced back to a mysterious culture known as the Beaker People.

The Beaker is thought to have constructed many of these megalithic sites in pre-history, part of a larger megalithic building civilization. Given their size and intricate positioning, during the Middle Ages, it was thought that Menhir and megalithic sites featuring a series of standing stones were built by giants who lived before the biblical flood.

Many of the ancient megaliths found in Europe were destroyed or defaced by early Christians, but it is estimated that some 50,000 megaliths once stood in Northern Europe, where almost 10,000 now remain.

The destruction of Menhirs is a huge loss in history since many of the ancient sites were engraved with different kinds of megalithic art. Menhirs would often become anthropomorphic stelae, although images of objects such as stone axes, plows, shepherd crooks, and yokes were seen as common symbols engraved by the ancients onto the different standing stones.

Some of the standing stones have been found to date back to around 4,000 BC, while their earliest examples exist from around 1,500 BC. Whatever their purpose was, standing stones and monoliths were a global phenomenon.

Callanish Stones

The Callanish Stones, or Tursachan Chalanais in Scottish Gaelic, is an intricate arrangement of standing stones positioned in a cruciform pattern with a main, central stone circle. Thought to have been erected in the Neolithic, the Callanish Stones were most likely the focus of ritual and religious activity in the region during the Bronze Age. Located near the village of Callanish, other ancient sites are located close to the Callanish stones. Nearby, we can find other stone circles, arcs, stones specifically arranged, and singular standing stones Menhirs. Some of them are even visible from the Callanish Site.

A close-up view of some of the Callanish Stones. Image Credit: Wikimedia Commons / CC BY-SA 4.0.
A close-up view of some of the Callanish Stones. Image Credit: Wikimedia Commons / CC BY-SA 4.0.

Impressive examples

The most impressive examples, dubbed Callanish II and Callanish III, are located about a kilometer southeast of the main site, consisting of stone circles. Given the sheer existence of other standing stones in the area, it has been suggested that the region surrounding the Callanish stones was central to many prehistoric rituals and religious activities that span more than 1,500 years.

Unlike other standing stones discovered across Europe, the Callanish stones consist of thirteen stones arranged in a circle and a monolith standing near the center. The central stone measures 4.8 meters high, 1.5 meters wide, and 0.3 meters thick. Its largest sides seem to be perfectly oriented to the North and South. Its weight is estimated to be around 7 tons. The Callanish stones have an average height of three meters, and the outer stone ring covers an area of 124 square meters.

The Callanish stones feature a chambered tomb between the stone circle’s central and eastern monolith. The tomb is 6.4 meters long and was built later than the stone circle. How were these massive stones moved? Carved? Why? And by whom?

Most Puzzling Ancient Standing Stone Monuments: Gobekli Tepe

Gobekli Tepe, or “Potbelly Hill,” is a site that dates back to around 12,000 years. It is one of Earth’s most ancient megalithic sites, and we know very little about it. We know that when history tells us hunter-gatherers inhabited the region, one of the most complex temples the world has ever seen was erected. Some 12,000 years ago, mysterious people erected massive, T-Shaped standing stones positioned within idiosyncratic circles. The stones discovered at the site are so large that experts say they are some of history’s oldest and largest megaliths.

A close-up image of one of the pillars at the site. Image Credit: Wikimedia Commons.
A close-up image of one of the pillars at the site. Image Credit: Wikimedia Commons.

Some 200 stone pillars

Around 200 stone pillars have been excavated at Gobekli Tepe until today. These 200 pillars were placed inside of 20 circles. The pillars of Gobekli Tepe have an average height of six meters and measure more than ten tons. How the site was built more than 12,000 years ago is one of the greatest historical and archeological mysteries.

The site is ancient. Radiocarbon dating, as well as comparative, stylistic analysis, suggest Gobekli Tepe is the oldest known temple discovered anywhere in the world. The site is even of greater importance when seeing its intricately carved T-shaped stones.

In other words, Gobekli Tepe is one of the most puzzling ancient sites in the entire world. Not only because it is considered the oldest temple on the planet but because we know absolutely nothing about the people that erected it. Nor do we understand why the ancient monument was buried in the distant past.

Standing Stones of Avebury

One of the best-known prehistoric sites in England is Avebury, home to the largest megalithic stone circle in the world. This is one of the most puzzling ancient standing stone monuments in Europe.

The site is believed to have been erected over several hundred years, around 3,000 BC. The Avebury stones comprise a central, large henge and a massive outer stone circle separated by smaller stone circles located inside the center of the site.


Like many other ancient sites, researchers have not managed to understand the exact purpose of the site. However, it is estimated that Avebury was a place where the ancients would perform either religious or ritualistic ceremonies.

The site is part of a much larger landscape of older monuments. The site itself is shrouded in mystery. The area where the monument was erected has yielded little archaeological information, and archeologists argue that evidence of human activity before the 4th millennium BC is limited.

Standing Stones at Avebury. Shutterstock.

Understanding the timeline

The timeline of its construction is another headache for experts. Despite this, we know that the monument was not indented as a single monument but resulted from a series of projects undertaken over several hundred years. According to the book Prehistoric Avebury (Second Edition) by archaeologist Aubrey Burl, the inner part of the central cove date back to around 3,000 BC. The inner stone circles were built a hundred years later, around 2,900 BC; the outer circle and the henge were built around 2,600 BC, while the avenues are thought to have been completed around 2,400 BC.

Since several such monuments were built around 4,000 BC, Britain must have had a sustainable economy since people decided to dedicate their valuable time to monument building. As for the site, although it could have been a kind of astronomical observatory, Burl argues that the site was where the ancients would perform rituals to “appease the malevolent powers of nature” that threatened their existence. Avebury is puzzling because we lack so much information about it. We can’t know who built it, what techniques were used, or why it was built. And the best part is most standing stones share those same characteristics.

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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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