How to unlock travel destinations in iD L?

[RainbowFoil]

I just recently bought a blue tamagotchi iD L. I heard there are a LOT of travel destinations. How do I unlock all of them?

 

[lemonboops]

You can get additional travel destinations by getting Tamatomo stamps, obtained after getting all happy items for a character.

4 stamps - Henshin Jo

8 stamps - Patchi Onsen

12 stamps - Melody Land
16 stamps - Concert

20 stamps - Waru Cafe
24 stamps - Uranai no Yakata (fortune telling)
28 stamps - Gotchi School
32 stamps - Gotchi King's Castle

More destinations can be downloaded, as well.