This unusual building can be found on the south terrace of Thurloe Square in South Kensington, London. This remarkable structure is indeed very much thin – but only on one corner. At its thinnest width the building is just about a meter-plus, but another end has a normal width. The reason for this wedge shaped building seems to be the railway line which runs behind the house right into South Kensington underground station. This "Thin House" even became one of tourists' attractions in London. But keep in mind: to be wondered of this magic house one need to look at it only from the "right view angle". So this is a great and very funny optical illusion like Witch House in Odessa , Ukraine.