Above is a famous series of paintings done by Claude Monet. He was a master of doing a "series of works". One was his "Haystacks series" These are of the Thames river in London. There was another series of a French Cathedral.
I have done work in "series" in the past and want to do another series in 2011. I haven't picked my sunject matter except that it will be landscape.
Off the top of my head I remember my "waterlilly series" (inspired by who else but Claude Monet). Then there was a series of the Shiawassee River.