Question 1

Where is Main Enclosure?

Accepted Answer

Main Enclosure is in Chiyoda, Tokyo, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Sword Art Online II does Main Enclosure appear in?

Accepted Answer

Main Enclosure appears in EP24 of Sword Art Online II.

Question 3

Can I visit Main Enclosure?

Accepted Answer

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

Question 4

Where was Sword Art Online II filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Main Enclosure is one of those real places (EP24).