Considering the Hotel Meia-Lua in Aveiro?
A VT member wrote the following comment about visiting Aveiro:
Moliceiros by global84
Although I did not get to do this, there are also tours of the canals and Ria de Aveiro, a wide marshland that was blocked from the ocean after a storm in the 1570s, on traditional seaweed boats called Moliceiros. The tickets for this can also be purchased at the tourism office, and it leaves at Canal Central right in front of where the sightseeing bus departs. It is a Venezia's gondola tour-equivalent of Aveiro, and gets filled up pretty quickly. So if you've got some time in the city, go ahead and do this tour! It will be a very special way to enjoy the city.