Themed Threads is a new sub-forum in the Challenges category for open threads. Please read the guidelines in the forum sticky before posting.
The old open threads in Other Cool Shots will show a red "Closed" label for a while, but if you click on them, you will be redirected to the new location of the thread.
As a reminder, if you are not interested in following a specific forum you can use the settings widget at the forum level to mute that forum. The forum will remain visible in Categories but new posts will not show for you in Discussions.