The pond is tranquil.
The pond is serene.
The pond is untroubled.
The pond is calm.
The pond is subdued.
water in lake is blue.
trees in the background.
tree branches hanging over bench.
trees on the other side of lake.
the lake is wide.
many trees on the other side.
 a tree in the woods 
body of water
an empty bench sitting on the side of a lake or pond by a tree in a park