Metrotwin
If anyone out there's planning a trip to London or New York this summer, you'll be interested to know that both cities have been recently twinned, the result of which is a website that provides some of the best places to visit. An extension of this site is Not For Tourists which is specifically written by locals, for locals. It reveals hidden gems that you may not find in some guidebooks and the recommendations come from experts, both bloggers and online communities. Just remember to keep it yourself...