The normal travel destinations are:
Game Center
Donuts Park
Gotchi Interior
TamaDepa
TamaMori Shop
Omiai Party (Matchmaker)
The secret travel destinations are:
Oshiro (Castle) Concert
Melodyland
Henshinjo
Patchi Onsen
Waru Cafe
Mamemame Lab
Gotchi School
Ha-tou (Heart?) Island