BBC - Cavemen Facts Hypermedia

BBC developed a website to accompany a documentary called 'Walking with Cavemen.' Within this rich set of resources is an area called 'Cavemen Facts.'  I like the grid and icon structure of the root menu.  When you click on a link or image, a window pops up with more information about the particular species. Within the pop up are additional media resources including audio and video and the ability to look at different images of the species.

Another thing that I really like is that the root page stays open behind the pop up, and the pop up window is small enough to let you know that the original menu is still just one click away.  I think I would like to organize my own course project page in a similar way, with a root level menu and then a next level pop up that contains links to more specific resources.