I don't mean leaving the city by public transport or whatever. I mean leaving the monotony of a particular area which I thought you meant in your OP.

Streets in London typically aren't the same for literal miles, whereas they can be in the case of some American suburbs where you need a vehicle like a car to escape it.

To be clear, my reference to the train station was to indicate how busy my local area can be. But despite that, you don't have to walk very far to find somewhere a bit more tranquil.