SAEDNEWS: The Kao Vortex is a fascinating natural whirlpool, measuring approximately 48 meters across and reaching a depth of 1,519 meters. Its powerful currents create a scene that is both mesmerizing and intimidating.
According to Saednews, Covão do Conchos is one of Portugal’s most breathtaking natural-looking attractions, often nicknamed the “Mountain Eye.” It may be hard to believe, but this enormous sinkhole is not a natural formation—it was created by Portuguese engineers.
At Covão do Conchos, the beauty of the mountains and human engineering come together to create one of the most fascinating sights in Portugal. The site attracts adventurous travelers who enjoy hiking and exploring unusual landscapes. The impressive structure is part of a long water tunnel, and falling into the opening would be extremely dangerous.
Covão do Conchos was constructed in 1955 to divert water from the Ribeira das Naves River into the reservoir behind the Lagoa Comprida Dam. The structure is part of the Comprida hydroelectric system and was designed to help manage and transport water through the mountainous region.
Located high in Portugal’s Serra da Estrela, reaching Covão do Conchos requires a considerable hike through the mountains. From above, the perfectly circular opening surrounded by rugged terrain and vegetation resembles a giant eye—or, as some visitors describe it, a fish moving through the mountains. This unusual appearance has helped make the site one of the region’s most recognizable attractions.
It is difficult to imagine finding such an unusual structure in the middle of a peaceful mountain landscape. The contrast between the green vegetation, rocky surroundings, and enormous water opening makes Covão do Conchos especially striking.
Visitors are often captivated by the scenery surrounding the structure, but approaching the opening requires great caution. The powerful flow of water can create dangerous conditions, so visitors should admire the attraction from a safe distance and follow local safety guidance.
The unusual appearance of Covão do Conchos has made it popular in photographs and travel stories. At first glance, the perfectly shaped opening can look almost unreal, leading many people to assume that it is a natural phenomenon. In reality, it is an impressive example of mid-20th-century engineering.
The structure is located in the Serra da Estrela region, near Guarda, and has existed since the 1950s. Over the decades, moss, grass, and other vegetation have grown around its edges, blending the man-made structure into the surrounding mountain landscape and making it even more visually spectacular.
