The Environmental and Geophysical Fluid Dynamics group maintains a mid-sized teaching laboratory.  At present we have a 1.5 m flume,  small 40 cm flume, a 40 cm square tank on a rotating table and a large, donut shaped tank.  Stratification is salt or corn starch based, and we have the means to record in both the laboratory and the rotating frame. Visualizations allow us to contrast theory and simulation with reality, and provide a strong link to the aesthetic side of fluid mechanics.  I find experiments zen-like in providing a very different rhythm from computer work, and especially during terms where undergraduates are in the group I like to try out new ideas as often as the schedule allows.