In the side-by-side images above, the photo on the left shows a city as seen by astronauts on the International Space Station, and then photo on the right shows a photo of a neuron imaged with fluorescence microscopy. One is massive and seen from a grand scale, while the other is microscopic and cannot be seen by the human eye, yet they look strangely similar in their structure.

via Photos Showing the Strange Similarities of Human Cities and Human Neurons.