I think there’s something like 40 IM courses round the world ?
None of the courses are as interesting as Watopia - and the requirements to build the course - most are two laps of 50 miles or so - well it’s a huge amount.
Get fit on Zwift and ride the course in preparation in real life. Personally I don’t bother - so long as I know I’ve got the gears to cope - I quite like the route to be fresh for me.