What sound do you find very soothing?

Travel Info
for some reason the sound of cars on the street is soothing to me, probably because of where i grew up

Travel Tips

Waves coming up on the beach!
Birds singing as the sun comes up!
Distant thunder and rain!
Others

a fan set on high
rain
i have to go to sleep with a fan blowing. its the only way i can sleep
a fart...it's the sound of relief....
ocean waves.... but when im at home.. the air conditioner will do :)
The sound of horses hoves on cobblestone, or the sound of waves crashing, also the sound of a train