Best lakes around Medio Cudeyo are often a result of the region's industrial past, particularly iron mining activities. This municipality in Cantabria, Spain, features unique landscapes where former mining sites have transformed into natural recovery areas. The area offers a blend of industrial heritage and natural beauty, providing opportunities for walks and exploration. Medio Cudeyo's natural spaces include both serene reservoirs and distinctive mining-origin lakes.
Last updated: May 7, 2026
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Las Llamas Park or Las Llamas Valley Park (officially Las Llamas Atlantic Park) is an 11-hectare urban park in the city of Santander, in the autonomous community of Cantabria (Spain). The first phase of this green space opened to the public on May 11, 2007. Another 426,000 m² are planned, extending almost to the border with La Albericia. Once completed, it will be the most wooded park in the city.
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The Pozos de Noja, known for its two artificial lagoons, the result of the industrial legacy of the old electricity company in the area, are proud to present their latest tourist innovation: a swing and a giant bench, unique spots for contemplating the landscape but also promising to be the setting for countless memories and photographs that will capture the essence of Cantabria. Access via SENDA DE TUERRA, with a bicycle path to the wells.
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A joyful corner, to think, to stop.
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From this small platform located in an elevated area next to the path, you have wonderful views of the Noja wells and with good visibility you can also see the coast of Santander.
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It is the main park and green lung of the city. A park that has it all, countless paths to walk, artificial lakes, fountains and everything you can imagine from a place like this. Wonderful to visit at any time of the day.
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There are two Valcaba pools and they are located at the foot of the Peña Cabarga massif. Its origin is artificial, they were used for mining in the area.
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Beautiful place in an old mining operation. The wells were used to wash the iron ore, now giving rise to 2 artificial lakes, surrounded by an ideal environment for nature lovers.
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The Wells of Valcaba are located at the foot of the southern slope of the Peña Cabarga massif and originate from mining in the area. This one in particular is the smallest and most "new" and located closest to the slope of the massif de los dos and can be accessed by a detour to the right marked by an information panel of the area with an explanation of the mining exploitation , the formation of the wells and the flora and fauna of the Peña Cabarga massif. You follow that path and you will reach the shores of the Lesser Well (today we did not reach the end because due to the floods of previous days the wells were a little overflowed).
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Medio Cudeyo features a unique blend of water bodies, primarily artificial lakes formed from past mining operations and significant reservoirs. You'll find sites like Pozo Menor de Valcaba and Lago Mayor de los Pozos de Valcaba, which are remnants of the region's industrial heritage, alongside the historically significant Embalse de Heras reservoir. The area also includes ecologically rich marshlands like Marismas de Solía and Marismas de San Salvador.
Yes, several spots are suitable for families. Las Llamas Atlantic Park, though in Santander, is an 11-hectare urban park with artificial lakes and numerous paths, perfect for leisurely strolls with children. The Pozo Menor de Valcaba area also offers an accessible path with information panels about its mining history, making it an educational and enjoyable visit for families.
The Marismas de Solía and Marismas de San Salvador are prime locations for birdwatching. These intertidal marsh areas are vital habitats for a diverse range of aquatic and migratory birds. The Marismas Blancas, in particular, with its extensive reedbeds and brackish lagoons, attracts species like Gadwall, Shoveler, Teal, and Pochard.
Many of Medio Cudeyo's lakes, such as Pozo Menor de Valcaba and Lago Mayor de los Pozos de Valcaba, originated from 19th-century iron mining operations. The Embalse de Heras reservoir was also constructed for mineral washing during the mining boom. These sites offer a unique glimpse into the region's industrial past, with old railway paths now serving as scenic routes.
Yes, there are several hiking opportunities. The old railway path along the Embalse de Heras offers a pleasant route for walkers. For more extensive options, you can explore the hiking trails around Medio Cudeyo, which include routes like the "Heras Reservoir – El Castaño de Rioz loop." The marshlands also have trails for observing nature.
The best time depends on your interest. For birdwatching in the Marismas de Solía and San Salvador, spring and autumn are ideal as migratory birds pass through. For hiking and general exploration around the reservoirs and mining lakes, spring and early autumn offer pleasant temperatures and lush scenery. Winter can also provide unique, tranquil walks, though some paths might be wet.
Yes, Pozos de Noja features a small platform in an elevated area offering wonderful views of its two artificial lagoons and, on clear days, the coast of Santander. The area also includes a giant swing and bench for unique photo opportunities.
The old railway path along the Embalse de Heras is generally accessible and enjoyable for leisurely strolls. Las Llamas Atlantic Park also has countless paths suitable for various mobility levels. For specific accessibility needs, it's always recommended to check local conditions or visitor information for individual sites.
Beyond walking and birdwatching, the region offers various outdoor activities. You can find running trails, including a "Heras Reservoir loop from Solares." For cyclists, there are road cycling routes that pass through the scenic landscapes around Medio Cudeyo.
Many outdoor areas in Medio Cudeyo are dog-friendly, especially on general hiking paths. For specific regulations regarding the Marismas de Solía and San Salvador, or around the mining lakes like Pozo Menor de Valcaba, it's advisable to keep dogs on a leash to protect wildlife and ensure a pleasant experience for all visitors. The Embalse de Heras's old railway path is generally suitable for dog walks.
The Embalse de Heras is notable for its historical significance, being tied to the region's 19th-century mining industry. Despite its industrial origins, it offers a harmonious landscape where human influence blends with nature. The old railway path along its western side provides an accessible and scenic route for walking, making it a unique blend of history and natural beauty.


Still not found your perfect lake around Medio Cudeyo? Check out the guides of these regions to see even more beautiful places.