Question 1

Where is Hotel 0 (Zero)?

Accepted Answer

Hotel 0 (Zero) is in Saitama, Saitama Prefecture, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of My Dress-Up Darling does Hotel 0 (Zero) appear in?

Accepted Answer

Hotel 0 (Zero) appears in EP11 of My Dress-Up Darling.

Question 3

Can I visit Hotel 0 (Zero)?

Accepted Answer

Yes. Hotel 0 (Zero) is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was My Dress-Up Darling filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Hotel 0 (Zero) is one of those real places (EP11).