Photo of the Day: Its that time of year when HMS Warboat puts its Xmas lights on and replaces the parking ropes with tinsel! #RAFLutonpic.twitter.com/BS47nIaIiY
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
First of all, they're called LINES, not ropes.
Secondly, they're used for MOORING, not parking.
Hence, mooring lines.
So there. 

Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.