The Black Well is considered one of the most beautiful natural attractions in the Swago region in northern Portugal. It is a beautiful pool of water that tends to black in color, hence the name. It also includes a wonderful waterfall that permeates the dark rocks and pours directly into them. The black well is characterized by its clear water and ideal for swimming. And diving, which attracts large numbers of visitors, especially families wishing to spend fun times in a quiet environment away from the hustle and bustle of the city.