Baixo Vouga
The Baixo Vouga is a Portuguese sub-region and part of the Centro region and the Aveiro district . The sub-region borders in the north on the greater Porto and the Entre Douro e Vouga , in the east on the Dão-Lafões , in the south on the Baixo Mondego and in the west on the Atlantic Ocean . The area of the sub-region is 1804 km². In 2001, 385,725 people lived in Baixo Vouga. The sub-region consists of twelve circles: