The ocean. Or any body of water. Heck a leaking faucet can zone me out. But the ocean is where I feel the most relaxed.
I love a mountain road too. Specially after a rain and the steam is rising up in the trees.
An open field is calming. When hay is about knee high and swaying in the wind. It moves a lot like water.
The sky at 2 in the morning on a clear night. All the stars are out in full glory and the air is a little cool and the world is quiet.
My own yard, at night when the frogs are croaking and the lightning bugs are playing.
I guess my answer is, all of them.
__________________
A flock of flirting flamingos is pure, passionate, pink pandemonium-a frenetic flamingle-mangle-a discordant discotheque of delirious dancing, flamboyant feathers, and flamingo lingo.