Question 1

Where is Hotel Marine Blue?

Accepted Answer

Hotel Marine Blue is in Toshima, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Durarara!! does Hotel Marine Blue appear in?

Accepted Answer

Hotel Marine Blue appears in EP3 of Durarara!!.

Question 3

Can I visit Hotel Marine Blue?

Accepted Answer

Yes. Hotel Marine Blue is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Durarara!! 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 Marine Blue is one of those real places (EP3).