#1 Fairy Door inside the Ann Arbor library:
#1 closeup of Fairy House in hollow books, inside Ann Arbor library.
#2 Fairy Door exterior, The Peaceable Kingdom:
#2 interior Fairy House in The Peaceable Kingdom:
#3 Fairy Door exterior, The Ark:
#4 Fairy Door exterior, Red Shoes:
#4 Fairy Door interior in Red Shoes.
#5 Fairy Door inside Himalayan Bazaar:
#6 Fairy Door inside Sweetwaters Coffee:
The first Fairy Door chronologically; appeared in April 2005.
#7 Fairy Door in the Shinola store:
This last one was tricky; wikipedia has it listed in the Selo-Shevel Art Gallery, but that closed in 2013. But the Shinola store is the same location, and still sports the Fairy Door.