We all know people who collect stamps, beanie babies, figurines, and other collections in display cases. My husband knows a guy with an ongoing anvil collection, and his interest has to do with a great-great-great grandfather who was a blacksmith. An anvil is a heavy iron block with a smooth, flat top and pointed end. Before the advent of welding, metal workers used anvils as forging tools. This friend rents a storage unit for his anvils.