We finally cleaned up and renumbered the titles of all the "Guess the City" threads. At the time this post was made, we're at Guess the City 256.
Here's some general guidelines to follow:
* To find out the contest number you should use, use this link.
* For the thread title, please use the format "Guess the City XXX", followed by ": Whatever Edition XXX" if it's a part of a running theme. Don't use "GTC" or "Gtc".