A walk in the woods and bird song. Add a little sun, a light breeze and you can have a relaxing moment to your self.
That is if you can get to some woods... and it's sunny... and there aren't people walking around shouting in a way that suggests a nice soothing lobotomy may be in order.
Just in case, here is a picture with bird song from Flatts Lane woods in the North East of England (Teesside area).
Here are just a few of the birds that can be seen in flatts lane woods