Here is the a lot of "Ancient altar" assets which include a lot of fantasy plants, trees, cliffs and totems (95 assets total). All textures are 4096x4096, and all topologies you can inspect in the Sketchfab preview. Vertex colors is included and can be used for some wind animations. Location is included too. Only assets were included for UE 4.* version.

Video location preview

Sketchfab assets preview

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Triangles counts from 48 tris to 106000 tris.