This is this month's cover of Cell, which covers advances in microbiology:
The cover depicts an adaptation the Boston subway system map in which subway lines represent pathways of differentiation from pluripotent stem cells. Bus routes, shown as dashed lines, are the various ways that cells can be experimentally interconverted via directed differentiation, direct conversion, and reprogramming. Cover image by Samantha Morris.
As a Bostonian biologist I am very bothered by the mismatch. ONLY TWO LINES GO TO PARK!
Via Boston Reddit.