A famously beautiful image of an actin network known to many of us as "the Svitkina image" is here. This image got me excited about actin in a way I wasn't willing to admit for years, especially as a proud lover of microtubules.
A rat intestinal cell absorbing a fatty meal is here. Next time you're tempted to order that delicious Fettuccine Alfredo, maybe this image will convince you to order the salad instead.
A dividing cell in metaphase, using Fluorescence Speckle Microscopy to visualize microtubule dynamics and kinetochores is here. Ah, spindles (contented sigh).
An animation of kinesin walking on a microtubule is here. If you feel moved for interpretive dance, you're not alone...my old labmates have seen my performance of this animation.