I've been known to wander up and down the same street several times looking for number 21 only to find it's not on the odd side of the street but of course next to number 20, only across the road, round the corner and in fact on a totally different street.
A work experience girl who I worked with some years ago could testify to this, poor love was dragged up and down a road in Bloomsbury while I desperately tried to find the AW M&S show, getting more and more agitated with every step.
So, it's no wonder you often see tourists looking totally perplexed as they try and find museums, theatres and parks.
The Tube can be equally confusing, so I think this cushion from Rockett St George is a must for visitors and native-Londoners alike.