Unchangeable things in map?

[IndiaHawker]

So with this newest version it seems like map is way more changeable than previous versions which is great. However when i start my first game what unchangeable things should I keep in mind when choosing a map? Please and thanks

 

[SheepMareep]

River outlets, dodo airlines, and the residence service tent.

You may find a lot of answers to your questions looking through videos on youtube (Nintendo life, crossing channel, mayor mori, so on)

 

[MortuusFever]

what Irishchai said and those ground outlits that look like cliffs are unchangable