Located on the rural area of the municipality of Mongua, and belonging to the Siscunsí Páramo, it is found the Laguna Negra (Black Lagoon), next to the Morro de Uze, the highest peak around the area. Although its water is cristal clear, the sediments and vegetation at the bottom of the lagoon, makes its water to look black, which at the same time, is the reason to name the lagoon in this way. In the old years, it was thought that walking nearby this lagoon was very dangerous, due to a great risk of being absorbed by its water..