I came across these save the date cards that I love! They are for destination weddings focused in big cities! Check them out at Wedding Paper Divas.
If you are having a destination wedding, I highly recommend planning ahead and sending out save the date cards! They will not only inform your friends and family about your upcoming event, but they will get your guests excited about the destination! Your attendees also have to organize their plans in advance so give them enough warning to make flights and get accommodations in your city of choice!
Source: Wedding Paper Divas