The architecture tour is an hour long cruise highlighting various structures along the river; lots of interesting stories. This is a good overview tour (not alot of in-depth "architech-y" details); which is perfect for hubby since he can quickly get bored/impatient on this subject. Great to sit up top on a sunny (less windy day) or seating (available inside) downstairs if you think it too cold. There are restrooms & a paid bar for drinks/snacks on board. If you go to their site shorelinesightseeing.com & sign up for their newletter, you can $5 off tix.