-The EU flag
Why is this in here in the first place? It doesn't fit graphically or thematically. Delete.
-The Jazz/EU Flag statue
I don't know, the statue is strange. Is it supposed to be some sort ancient jade statue, what with the emerald eyes and all? If so, why is it proudly flying an EU flag?
Delete. The flag makes it kind of a limited-use tile, anyway.
-The rock statues
I think they look ugly. That, awkward size and other usage issues means that if nothing can be done to significantly improve them... delete.
-Horizontal waterfalls
If it was modified a bit to have darker, lower-contrasting colors and not be so... rectangle-ish (like that modified vertical waterfall Kbout posted) it might make tolerable mist. If not, delete.
-Multicolored Inferno trees
See -The EU flag