The Pyramids of Güímar are six rectangular pyramid-shaped, terraced structures built from lava stone without the use of mortar. They are located in the district of Chacona, part of the town of Güímar on the island of Tenerife in the Canary Islands, Spain. The structures have been dated to the 19th century CE and they may originally have been a byproduct of contemporary agricultural techniques.
Other pyramids employing the same methods and materials of construction can be found in various sites on Tenerife. In Güímar itself there were nine pyramids, only six of which survive.
In 1990, adventurer and publisher, Thor Heyerdahl, became aware of the "Canarian Pyramids" by reading an article written by Francisco Padrón in the Tenerife newspaper "Diario de Avisos" detailing "real pyramids on the Canaries". As Heyerdahl had hypothesized a transatlantic link between Egypt and Central America, he became intrigued by the Güímar pyramids and relocated to Tenerife. There Heyerdahl researched possible parallels between the Canarian terrace structures and pyramid structures in Egypt and Central America in pre-Columbian Mesoamerica as ceremonial areas.
Heyerdahl hypothesised that the Canarian pyramids formed a temporal and geographic stopping point on voyages between ancient Egypt and the Maya civilization, initiating a controversy in which historians, esoterics, archaeologists, astronomers, and those with a general interest in history took part.
In 1991, research by Juan Antonio Belmonte Avilés, Antonio Aparicio Juan and César Esteban López, researchers of the Canary Institute of Astrophysics, shown that the long sides of some of the terrace structures at Güímar marked the direction of both solstices. The main limiting wall points to the sunset in the Summer solstice and the pyramids have stairs on their western side which face the direction of the rising sun on the Winter solstice. Also, standing on the platform of the largest pyramid on the day of the Summer solstice it is possible to experience a double sunset, as first the sun sets behind a mountain top, then it emerges again from behind the mountain and sets a second time behind a neighbouring peak. However, considering the room for interpretation, it is impossible based solely on these observations to conclude what was the intention of the builders or the building date.
In 2005, a book was published in Spanish by Aparicio and Esteban titled The Pyramids of Güímar: Myth and Reality. Aparicio and Esteban suggest that the solstitial orientations of the pyramids were potentially motivated by the Masonic symbolism. These authors argue that solstices are very important in the symbolism of Freemasonry, and that the owner of the land in the epoch in which the pyramids were built was himself a Freemason. This motivation would be only an aesthetic one and would not modify in any rate the fundamental motivation (agriculture) and date of construction.
Between 1991 and 1998, with the agreement of Thor Heyerdahl, multiple excavations of the site by archaeologists of the University of La Laguna (Departamento de Prehistoria, Antropología e Historia Antigua) took place. In 1996 the results of the 1991 excavation were presented at a colloquium (published in 1998), providing evidence for the dating of the pyramids. According to the preceding geophysical Georadar-Survey eight locations adjacent to the pyramids, each with an area of 25 m², were investigated in layers down to the solid lava-floor. In doing so it was possible to establish three specific sediment layers. Starting from the top these were:
Furthermore, under the border edge of one of the pyramids, a natural lava cave was discovered. It had been walled up and yielded artefacts from the time of the Guanches. Since the pyramids lie stratigraphically above the cave, the Guanche finds from between 600 and 1000 AD can only support conclusions on the date of human use of the cave. The above survey indicates that the pyramids themselves cannot be older than the 19th century.
The archaeologists involved maintain that the creation of the terrace structures followed from the practices of the 19th century rural population, who created these structures while clearing cultivatable land of stones, as they piled the stones into these terrace shapes. The excavations and subsequent research support a date for the construction of the structures no earlier than the 19th century.
Heyerdahl suggested that the structures were not haphazardly piled-up stones. Heyerdahl maintained a belief in the hypothesis that the pyramids were connected with Guanches until his death. The association of the Guanches and the pyramids continues to be elaborated upon both in "Pyramid park" and on its official website.
Aparicio and Esteban's theory connects the facts that the pyramids were built in the 19th century with the acknowledgement that they are not simply piles of stones.
Following the completion of the excavations in 1998, the 65,000 m² area surrounding the pyramids was made accessible to the public. Heyerdahl received financial support from his friend the Canarian businessman Fred Olsen, who owns the largest transport company in the Canaries and whose family came to the islands from Norway in the 20th century. An information centre provides visitors with information about Heyerdahl's research trips and his previous ideas regarding the pyramids. Two pavilions contain exhibits relating to Heyerdahl along with models of his boats; a replica of the Ra II in its original size, amongst others. In spite of the conclusions regarding the age of the pyramids outlined above, Heyerdahl continued to maintain a belief "in a possible relationship between the existence of the pyramids and the pre Hispanic civilisation on Tenerife". The objects found in the Guanche cave are shown in the "museum" in heavily enlarged photos, whilst the imported ceramics from the 19th century are mentioned only briefly on an information board - without illustration.