To get to the Daymán Hot Springs in Uruguay from Montevideo you can take a bus to the city of Salto and then another bus that goes directly to the hot springs.
It is also possible to arrive by car, taking National Route 3 to the city of Salto, and then National Route 31 to Termas del Daymán.
Another option is to take a flight from Montevideo to Salto International Airport and from there take a taxi or a bus to the hot springs.
See more about the history of Termas del Dayman
See also information on Montevideo y Salto.