If you, like me, work on the hippocampus, you know that it is incredibly hard to understand how the hippocampal formation actually looks like in 3D. Dentate Gyrus and CA3-CA1 lie in the rat along the dorsal-ventral axis but also traverse the medial-lateral and anterior-posterior axis.

Now you can order a 3d print of the hippocampus at Shapeways which helps a lot to understand how the neural layers look like and how they are interwoven.