This is an image of bovine arterial endothelial cells that have been labelled with a red for actin and green for microtubules. This basically composes the intracellular matrix. You probably remember these structures from my previous posts about neuronal growth cones, which break down actin near the microtubles and add pieces to the leading edge in order to make the dendrites grow out to where they can make connections to other neurons, such as seen here. I really just think the intracellular matrix looks gorgeous on its own.
[Image by Nadinath Nillegoda, found here]