If we had to choose but one shop to carry our whimsical field guide to identifying unicorns by sound, it would be [now sadly out-of-business] Castle in the Air in Berkeley, California.  Imagine our delight to hear that folks had been "pawing through it, gleaning its wisdom."  [Thanks, Clint!]

Speaking of castles in the air, we spotted the immaterial tower below within the world of Google Maps.  This castle "exists" in the town of Warwick, England.  But get this: we spent so much quality time bi-locating to England that Google defaulted our browser to the U.K. version.  No kidding: we're automatically redirected to Google.co.uk, even when we explicitly type "google.com."  Can't make this stuff up.