Dajabón
Dajabón is at  to the northwest of Santo Domingo, on the western end of the Yaque del Norte Valley (or Línea Noroeste), a part of the larger Cibao valley. The city is on the eastern side of the Dajabón or Masacre river; this is the only important river in the municipality. There is a bridge across the river and the Haitian city of Ouanaminthe is near the western side of the river.