Just like you "I've lived all my life without ever going from the island I was born in", never visit any other country but if you ask where i'm going to visit, Europe probably my first destination especially Germany or Russia. Visiting Brandenburg Gate, Red Square, (Reichstag maybe) and other historical place.
Also Japan, i want to visit Akibahara and historical-related place and China, i wanted to see other "7 Wonder of the World" because i have one of wonder in my country and i want to see the other.