At the Destinations website, users first write the location of a place they would like to visit, and then a very brief explanation of why they want to go there. Their response is then shown on a map of the area they chose, along with the url address of their place and what they wrote.
The website creators send out a “tweet” on Twitter after each time someone responds, and they review each response and consider placing it on their regular front page “rotation.”
All this can be done without registering.
I’m adding it to The Best Places Where Students Can Write For An “Authentic Audience”.