We spent the day in Port Adelaide, an easy train ride from Adelaide. It's a partly gentrified industrial port town with a Sunday Market and several museums. We took a 2 hour dolphin watching cruise on the river for the amazingly low price of AU$4 per person (about US$2.75). We only saw a couple of dolphins and, suprisingly, one dog crossing the river. But even if we hadn't seen any it was a very pleasant cruise, more than you'd expect given the rather industrial scenery. The glorious sunshine didn't hurt.
Port Adelaide waterfront
My one partially successful photo of a dolphin.
The industrial landscape, actually kind of interesting
Not our tour boat
Me with the wind blowing in what's left of my hair.
The Railroad Museum