white icon meaning?

[barren galleon]

Hi guys, I just got the game and I just finish defense of the dark arts and I noticed a white icon on my mini map. However, upon checking it out at the location, I couldn't find anything anywhere about it. Hopefully someone can help me out

[unique spruce]

That’s a treasure chest. :)

[solar vine]

That’s a treasure chest and going by the little arrow pointing up that’s just above it, it’s on a higher floor.

[unique spruce]

Oh, yes, I missed that little detail.

[barren galleon]

Thxx for the details ... didn't know that.