The Protected Lunarejo Valley Landscape is located in the extreme northwest of the department of Rivera, very close to Artigas and Salto and the border with Brazil. It is located in the northern part of the Cuchilla de Haedo system, which functions as a biological corridor for subtropical species of flora and fauna to enter Uruguayan territory from Brazil. It is an area representative of the Quebradas del Norte or the Cuesta Basáltica, a region that is notable for having a landscape of great beauty, with scenic features which are unique in the country, characterized by hills with flat tops which border narrow valleys shaped by the courses of the water known as "quebradas" (Gorges). The gorges are deep incisions notched into the basaltic rock, with steep slopes and reliefs, where caves, vertical surfaces and waterfalls converge and lush, subtropical jungle-type vegetation forms. The area possesses a great diversity of natural environments, including different types of grasslands, forests (hill, coastal, gorge), shrublands, rivers and creeks that provide shelter and food for many species of native fauna of great interest due to their rarity, distribution and abundance. In terms of birds, at least 150 species have been recorded, many of which can only be spotted here, including the sharp-tailed grass tyrant, the Buff-necked ibis, the Cliff flycatcher, the Seriema, the Blue-winged macaw and the Broad-winged hawk. Among the amphibians we can highlight two rare species: the Montevideo tree frog and the Rivera Redbelly Toad; among the reptiles the Crotalus durissus —extinct in the south of the country— and among the mammals the Anteater, the Greater naked-tailed armadillo, the Margay, the South American coati, the Brazilian porcupine and the Gray brocket.