If you're super squeamish about blood this might be a teeny bit uncomfortable, but I found it absolutely fascinating. City of Hope shows each step a unit of donated blood takes on its journey from a donor's arm to a patient in need. It's a peek into the circulatory system that helps your hospital save lives every day.

We often think of blood in terms of violence or injury, a sight that indicates something's gone terribly wrong. But in the setting of a hospital lab, blood is a precious commodity. Seeing it handled with such care and precision might make you think a little differently about the life-giving substance coursing through your body. It really is beautiful. [Many thanks to Andy F. for the tip!]