A new attraction has been built in the Mega shopping centre in Ufa on Friday — 'the House of the Flip-flop.' According to the production company, this is the biggest inverted house in the world. Its area is more than 300 sqm (3220 sqft). In addition, more than 50 people can attend the house at the same time. A reported 20 million roubles has been invested in the house, which is planned to be... Еще recouped in two years. More than 100 people worked on the project. The main expense was the development and assembly of the house. Similar attractions have already been built in Germany, Poland and China.