In which Sid and Doris try and nearly fail to visit the famous Art Nouveau town.
The small roads south from Porto to Aveiro are of the style: ribbon development dull so we find bigger roads to take us into Aveiro. This is carelessly likened to Venice, as indeed seem to be any towns with more than one canal. Well the parking is nigh on impossible, so it does have something in common with Venice. 
We finally find Hermann a snug space in a carefully-poorly-signposted underground car park (don’t want all the tourists clogging it up) although some of the spaces are so snug that they tell their own story.
We emerge carefully into the daylight to admire the abundance of Art Nouveau buildings (or Jugendstihl, Arts and Crafts, organic swoopy architecture, fonts and tiles).
We lunch in the cafe of Aveiro’s Art Nouveau museum which is helpfully open while the museum itself is closed for lunch (don’t analyse that sentence too closely). And just when you thought you were going to get a day without pictures of tiles, the Portuguese/Aveiro version of Art Nouveau extends to the tiles too.
We take pictures of a few other AN buildings and amble happily back to Hermann’s bunker resisting the offers to sell us Aveiro’s famous egg-based speciality sweets Ovos Moles (which look scarily like meringue-based versions of Cadburys Creme Eggs).
We have not taken any photos of the canals or the gondoliers. The ever-reliable Mr Wikipedia has at least as much information about these as you might want here. Onwards to Coimbra.