What is "bigo"

Bigo, also Bigo bya Mugenyi, is an extensive alignment of ditches and berms comprising ancient earthworks located in the interlacustrine region of southwestern of Uganda, Africa. Situated on the southern shore of the Katonga River, Bigo is best described as having two elements. The first consists of a long, irregular ditch and bank alignment with multiple openings that effectively creates an outer boundary by connecting to the Kotanga River in the east and the Kakinga swamp to the west. Toward its eastern end the outer ditch branches further to the east to encompass a nearby crossing of the Katonga River. The second element consists of a central, interconnected group of four irregularly shaped ditch and bank enclosures that are connected to the Katonga River by a single ditch. Three mounds are associated with the central enclosures; two within and one immediately to the west. When combined, the Bigo earthworks extend for more than 10 kilometers. Resulting from radiometric dates collected from archaeological investigations conducted in 1960 and additional investigations undertaken at the Mansa earthworks site in 1988, 1994, and 1995, the Bigo earthworks have been dated to roughly AD 1300-1500, and have been called Uganda's "largest and most important ancient monument."