Lakes around Guareña, Spain, are primarily large reservoirs within the Extremadura region, known for their ecological significance and recreational opportunities. This area is characterized by expansive water bodies that serve as important natural features and historical sites. The landscape offers a blend of ancient engineering and diverse ecosystems, providing varied experiences for visitors.
Last updated: June 20, 2026
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The Cornalvo Dam is an impressive Roman engineering work located about 15 km from Mérida. Built in the 1st century AD, this dam is still in use today and is part of the Cornalvo Natural Park. The reservoir is an ideal place to enjoy nature and explore Roman history.
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Built around 130 AD, this dam was used to supply water to the ancient Roman city of Augusta Emerita. The reservoir and its surroundings were declared a natural park in 2004, making it an ideal destination for nature and history lovers.
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A place with very nice views of Sierra Bermeja. It has a circular path of about 5/6km that is very cyclable, with an initial part (depending on which direction you go) that is a bit steep.
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Recreational area full of water and shadows to walk or run through, with spaces for everything and quiet!
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In spring the number of birds that can be observed from its viewpoints is spectacular and how beautiful the site can be.
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In spring the number of birds that can be observed from its viewpoints is spectacular, without counting the herds of cattle that come to drink and frolic on the shore of the reservoir.
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Reservoir that is located within the Cornalvo Natural Park and that represents one of the water areas that exist in this protected area. Very beautiful in leafy and wet seasons!
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One of the attractions of the Cornalvo Natural Park is the homonymous reservoir that is very close to the town on the A-5 highway and is easily reached from Trujillo or San Pedro de Mérida. A place that deserves to visit and to which you can turn completely around a picturesque path.
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The region is rich in history, particularly around the Cornalvo Dam. This impressive Roman engineering work, built around 130 AD, was designed to supply water to the ancient city of Augusta Emerita and is still in use today. It's a significant part of the Cornalvo Natural Park, offering a blend of nature and ancient history. You can learn more about its history on archaeologyhistory.com.
The lakes around Guareña, primarily large reservoirs, are known for their diverse natural beauty. The Cornalvo Reservoir, located within the Cornalvo Natural Park, is particularly beautiful during leafy and wet seasons. Further afield, the vast La Serena Reservoir features unique inland islands like Cerro Masatrigo, a 'magic mountain' with a perfect conical shape. Orellana Reservoir, often called Extremadura's 'inland sea,' boasts extensive waters and a Blue Flag inland beach.
Yes, several lakes offer family-friendly experiences. The Cornalvo Dam and Cornalvo Reservoir are both considered family-friendly, offering opportunities for nature exploration. Las Muelas Reservoir is great for birdwatching, which can be an engaging activity for children. Laguna del Voluntário is a recreational area with water and shade, ideal for walks and quiet family time. Orellana Reservoir also offers a wide range of aquatic activities suitable for all ages, including swimming and paddle-boarding, with its Blue Flag beach.
The best times to visit are generally spring (April–May) and autumn (September–October) for comfortable weather and vibrant scenery, especially around the Cornalvo Natural Park. During these seasons, the Cornalvo Reservoir is particularly beautiful. Summer offers opportunities for water activities and bathing at Cornalvo and Orellana, while winter is ideal for observing large concentrations of Common Cranes at Cornalvo.
The lakes are excellent for wildlife observation, especially birdwatching. Cornalvo Natural Park, encompassing the Cornalvo Reservoir, is home to over 200 vertebrate species, including endangered birds like the Spanish imperial eagle and black stork. La Serena Reservoir and Orellana Reservoir are both Special Protection Areas for Birds (ZEPA), offering opportunities to see aquatic birds, birds of prey, griffon vultures, Egyptian vultures, and various ducks. In spring, Las Muelas Reservoir is known for its spectacular number of birds.
Yes, the region offers various trails. The Cornalvo Natural Park has shoreline paths through oak groves, and there's a Pantano de Cornalvo Circular Route, which is about 5-6 km and suitable for cycling. For more options, you can explore Cycling around Guareña, which includes the 'Cornalvo Park and Reservoirs Loop', or find MTB Trails around Guareña and Road Cycling Routes around Guareña.
Swimming is possible in some areas. The Cornalvo Reservoir has a designated bathing area with grass and a beach bar during summer. Orellana Reservoir is particularly known for its clean waters and is a popular spot for swimming, being the first inland beach in Spain to receive a Blue Flag award for its excellent water quality and facilities.
The larger reservoirs offer a variety of water sports. Orellana Reservoir is a hub for activities like swimming, paddle-boarding, sailing, and windsurfing. La Serena Reservoir permits navigation with both explosion and electric engines, kayaks, float tubes, and pontoons, and is also popular for predator fishing.
While specific regulations can vary, many natural areas in Extremadura are generally welcoming to dogs on leash, especially on trails. The Cornalvo Natural Park, which includes the Cornalvo Dam and Cornalvo Reservoir, is a popular spot for walks with pets. Always ensure your dog is under control and respect local signage regarding pet access.
Several locations offer excellent viewpoints. Las Muelas Reservoir is specifically noted for its viewpoints, especially in spring when many birds can be observed. The Pantano de Cornalvo Circular Route also provides very nice views of Sierra Bermeja and the reservoir. Laguna del Voluntário also offers scenic viewpoints.
La Serena Reservoir is one of the largest reservoirs in Spain and the second largest on the Iberian Peninsula, covering approximately 14,000 hectares. It's crucial for irrigation, urban water supply, and hydroelectric generation in the Guadiana River Basin. Beyond its practical uses, it's a Special Protection Area for Birds (ZEPA) and offers diverse landscapes, including unique inland islands. More details can be found on Wikipedia.


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