Shartak "Where the heck is this place?" map - Javascript written by Simon
Clicking in the top-left corner of the map should give [-70.756,+26.625] and the bottom right should give [-70.022,+26.235] - if you find it doesn't work, please let me know what browser you're using.
This is the stupidly large map. If you require less accuracy, you can use a smaller map.
When you click, this text is replaced with the GPS co-ords.