Guaqui is a railhead and port in Bolivia on Lake Titicaca. A ferry (a car float) connects with the Peruvian railhead and port on Puno.
Its elevation is 3822 m.
The railways on the Bolivian side are 1,000 mm (3 ft 3 3⁄8 in) gauge, while the railways on the Peruvian side are 1,435 mm (4 ft 8 1⁄2 in) gauge.
Coordinates: 16°35′00″S 68°52′00″W / 16.58333°S 68.86667°W