Ushuaia in Argentina is perhaps the coolest place to fast where you only get to fast for 10 hours. If you do not want to go that far you can try Cape Town which has a thriving Muslim community. Or even Auckland.
Where ever you plan to spend your Ramadan, may it be blessed. And, if you are feeling charitable, please remember TCF - they currently manage 1,441 schools and provide education to over 200,000 needy students - www.tcf.org.pk