An old Reservoir, probably from around the eighteenth century, whose main function was to use the water of the stream to move the wheels of at least four mills and also for watering small vegetable gardens. It is on the outskirts of the city, taking the road from Trujillo to Montánchez, just 500m from the last houses. The best place to stand is at the start of tracks leading from the road at the entrance of the farms near the reservoir.
From this corner of Trujillo we can see some waterfowl mainly Mallard (Anas platyrhynchos), some waders, including Common Sandpiper (Actitis hypoleucos), Little Ringed Plover (Charadrius dubius) and the always elegant Black-winged Stilt (Himantopus himantopus), Red-rumped Swallow (Hirundo daúrica) and, if we look towards the plains, it is not hard to see Black Kite (Milvus migrans) in summer and a Red Kite (Milvus milvus) in winter among others. It is good place to see one of the most interesting reptiles of the area: the Spanish Pond Terrapin (Mauremys leprosa).