This is the stainless steel inside of a liquid nitrogen drum that housed biological samples from 1987 to 2012.
I help run a lab and we had to replace this unit with a new one. Once all the liquid nitrogen burned off, what was left was this nasty little stew of leftover specimen.
This InstaGram shot reminded me of a far away view of a polluted planet. But I also think this shot is kind of pretty, too.
Below is another InstaGram shot I took of the old machine getting filled manually for the last time.