Hidden behind the throng of tourists around the London Eye lies Leake street tunnel. It runs 300 metres under the platforms and railway of Waterloo station. The smell of spray paint is strong enough that you won't want to spend long there but ranks as the place to see profound street art south of the river. Regardless of the stench and sketchy atmosphere; the array of ever changing graffiti art sprawled all the way down the tunnel is certainly impressive. Halfway down there is an art cafe decked out like an art studio, old sofas and board games. Tea per cup costs £1.