The Metropolitan Museum of Art and the Guggenheim offer 474 free art books online. 99 art catalogs from the Guggenheim. 375 MetPublications. An example: Masterpieces of Painting in the Metropolitan Museum of Art [more inside]
"It became an accessory of fashion. Status symbol like jewels, the fan had some additional advantages: you could hide behind, spy through tiny holes in the fan, swirl the fan coquettishly, or move the fan according to difficult fan language conventions, a kind of early telecommunication." [more inside]
Waymarking.com provides tools for you to catalog, mark and visit interesting and useful locations around the world. It's a fun site, packed with photographs, information and maps; a useful resource and tool for GeoCaching and other interests. Among the various categories included is Oddball Museums: The Glore Psychiatric Museum, Musee Mechanique, The National Plastics Museum with lots of great pics and links to other sites, Museum of Burlesque [nsfw], The Leavenworth Nutcracker Museum, Orange Show, wbur Museums of Dirt, Plumbing, Antiquated Technology, Lizzie Borden and more oddities.