I've been tossing around the idea for a while of taking a course or two a year in something that sounds like fun: watercolor, cooking, art history, Spanish. Heck, I even have a friend who took a course in beekeeping. How cool is that? There are absolute tons of colleges, universities, and community colleges around here, and the offerings are pleasantly varied.
I just saw at the smu.edu site a course on the Trans-Siberian Railroad that I think my Dad would enjoy.
I already have several obligations (mostly training dates/tiimes) that prohibit me from attending some of the multi-week sessions, but there are several that are just one or two sessions in length that I could work into other weeks.
What's available in your area?