OR you could get an already made island map and build your own city own it...
For reasons I can't remember, when I was younger and played Lego Island 1 on PC, It creped me out how lonely it felt sometimes and sometimes I couldn't find a place and would think it was gone. Please note I said "when I was younger" and now I know I just kept forgetting the EXACT path you needed to use :P Although the door still wouldn't open because the door keeper guy was still working there or whatever.