In a world where natural phenomena are often explained by science, there are events that seem to escape logic and immediate understanding. Among these, one of the most fascinating is the “double sunset”, an optical phenomenon that occurs when the sun appears to set twice in the same evening, in specific places on Earth. This show, which seems to belong to the realm of illusions, is actually a reality observable in some locations, where particular geographical and atmospheric conditions allow the sun to temporarily reappear after its first sunset, creating a breathtaking effect.
The mystery of the double sunset
The double sunset phenomenon occurs when the sun sets behind a mountain or hill, but due to atmospheric refraction and observation angle, the sunlight is bent and causes the sun to appear above the horizon again for a short time. After a few moments, the sun disappears again, completing the final sunset. This optical phenomenon, which occurs in particular geographical conditions, may seem incredible, but it is a reality observable in some locations around the world.
Orasso: the double Piedmontese sunset
An example of a double sunset is found in Italy, precisely in Orasso, a small town located near the border between Italy and Switzerland. Here, the phenomenon occurs every winter, thanks to the position of Monte Riga. On certain days, the sun sets behind the mountain, but atmospheric refraction and the particular shape of the landscape mean that the sun reappears briefly above the horizon, creating a double effect. This phenomenon is visible only from a specific point, and its rarity makes it an event that attracts the attention of astronomy enthusiasts and nature curious.
Barga and the magical arch of Monte Forato
In Tuscany, in Barga, the double sunset has become a local tradition, so much so that the phenomenon is known as one of the most spectacular in the region. Every year, in the days around November 11th and January 30-31st, the sun seems to set behind the natural arch of Monte Forato, and then reappears briefly before finally disappearing. The scene is so suggestive that many Barga residents and tourists gather these days to witness this natural spectacle. The particular conformation of Monte Forato, with its natural arch, allows you to observe the sun “disappearing” and then “reappearing”, creating an optical effect that amazes those lucky enough to witness it.
Tenerife: the double sunset of the pyramids
Another place where you can observe the double sunset is located in Tenerife, in the Canary Islands. In the city of Güímar, a similar phenomenon occurs in alignment with the local pyramids, during the summer solstice. The position of the pyramids and the configuration of the landscape allow the sun to set behind a hill and then reappear briefly, creating a double sunset. This phenomenon, although less known than others, has attracted the attention of many scholars and archaeoastronomy enthusiasts, who see the Güímar site as evidence of ancient astronomical observations.
Leuk, Staffordshire: the English double sunset
In England, specifically in Leek, Staffordshire, the double sunset has been documented since 1686, when Dr. Robert Plot described it in his book The Natural History Of Stafford-Shire. The phenomenon occurs on the days around the summer solstice, when the sun sets behind the Bosley Cloud hill, then briefly reappears before finally disappearing. This sight is still visible today, although tree growth has limited visibility from the original spot. Fortunately, the double sunset can still be admired from other locations around Leek, where the configuration of the landscape allows the phenomenon to be observed.
Scotland: Kintraw and the prehistoric double sunset
Even in Scotland, the double sunset phenomenon has aroused the interest of scholars. In the locality of Kintraw, in Argyll and Bute, the phenomenon is visible between the mountains of Beinn Shiantaidh and Beinn a’ Chaolais. The site was studied by researcher Alexander Thom, who hypothesized that Kintraw was an ancient astronomical observatory used to monitor the winter solstice and double sunset. The area, rich in prehistoric sites, represents an example of how ancient peoples could have used natural phenomena to create astronomical alignments. Although Thom’s interpretation has been the subject of debate, the phenomenon remains fascinating to archaeoastronomy enthusiasts.
A phenomenon that defies logic
The double sunset is a phenomenon that defies logic and common understanding. Its rarity, combined with the spectacular nature of its optical effect, makes it an extraordinary event that fascinates anyone lucky enough to witness it. Although science can partially explain the cause of this phenomenon, its visual effect always remains a mystery that continues to enchant. In a world where natural phenomena are increasingly understood through technology, the double sunset reminds us that nature still has the ability to surprise us, showing its beauty and mystery in ways that go beyond our immediate understanding.
