Jebediah sez, "This is a photo gallery of strange and striking freeway interchange configurations, including ones like the volleyball, the double trumpet, and the turbine. Many are as, or more, visually interesting than the cloverleaf. Learning all the different varieties makes one feel a bit like a birdwatcher when driving on the interstate. 'Oh, there's a classic diamond! And there's a clovermill!'"
What's A 'Spooey'? A Field Guide To Freeway Interchanges, Part 1 (Thanks, Jebediah!)