Aveiro is a city on the west coast of Portugal set along a lagoon called Ria de Aveiro. It's distinguished by its canals navigated by colorful boats (barcos moliceiros), traditionally used to harvest seaweed. Not far from its core, known for art nouveau buildings, is the Cathedral of Aveiro, with its prominent bell tower. The Museu de Aveiro, housed in a former convent, has a lavish tomb made of marble.