Old radiators

So we saved the old steam radiators from our c. 1900 farmhouse.  I grew up in a house with steam radiators.  I do not want to put them back, but I do want to figure out a good secondary use for them.  I need to build some other structures here on the farm and wonder how I might plan to use these old things.  They're rather YUGE compared to the ones I grew up with.  Maybe someone can point me to info on what you get for the size somewhere?

So, how could they be re-used, other than the obvious (which is always an option)?

Thanks heaps,