Question 1

Where is Ryugu Sea Cave?

Accepted Answer

Ryugu Sea Cave is in Shimoda, Shizuoka, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Yuru Camp△ Season 2 does Ryugu Sea Cave appear in?

Accepted Answer

Ryugu Sea Cave appears in EP10 of Yuru Camp△ Season 2.

Question 3

Can I visit Ryugu Sea Cave?

Accepted Answer

Yes. Ryugu Sea Cave is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Yuru Camp△ Season 2 filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Ryugu Sea Cave is one of those real places (EP10).