This is a group fotolog called Scavenger Hunt. There is a list of items that need to be photographed. Some of the items are easy, while others are more difficult. If you have a picture for one of the items, upload it with a caption that tells people what number and item it is off of the list.
Everyone can post their pics of any kind of fences, gates and closely related stuff here. If there is just a tiny spot of a fence or a gate or something closely related, go ahead and upload;)