As Robert Krulwich explains at Krulwich Wonders, the NPR science blog, these miniature works of art and others have been left mysteriously at libraries, an arthouse cinema, a book festival, and other book-related venues in Edinburgh since this past spring:
A closeup of the teacup:
Many more at Central Station and Krulwich Wonders, where Krulwich examines how the anonymity of the artist adds to their exquisiteness, and how the city of Edinburgh has decided not to want to know who made these.
(Have you found something online that’s really awesome? Send a link or an image, and I might post it!)