Question 1

Where is Rainbow Tower?

Accepted Answer

Rainbow Tower is in Namegata, Ibaraki, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Touring After the Apocalypse does Rainbow Tower appear in?

Accepted Answer

Rainbow Tower appears in EP8 of Touring After the Apocalypse.

Question 3

Can I visit Rainbow Tower?

Accepted Answer

Yes. Rainbow Tower is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Touring After the Apocalypse filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Rainbow Tower is one of those real places (EP8).