221B Baker Street Floorplan
Not technically part of the Tour de Holmes, but amazing nonetheless.
An artist has done what has previously been impossible — reconciling all of the 60 canonical stories to provide a comprehensive floor plan of 221B Baker Street. He posts a comprehensive explanation for his details on his blog. You can also buy a variety of things with this floor plan on it from Zazzle and CafePress.
For whatever reason, floor plans totally bring me geek joy. Thanks for sharing, this is super, super cool.
I thought so too. I seriously debated getting this on an iPad case, but $50+ was just a bit too much for me.