I want to draw attention to the Viewmate search tool on the JewishGen.org site. It's more related to genealogy and family history research than to travel, but those interested in Jewish heritage in general may find it worth looking at (or using).
Users can upload photos, documents and other material to ask other users to help with translations, photo identification and other queries.
I didn't upload anything (though I'm tempted to upload some tombstone epitaphs to ask for help with translations), and you have to register to get replies or reply. But there are some fascinating images just to browse.