A huge new upside-down house opened to the public in the Russian city of Ufa on Friday. Called the 'Flip-Flop House,' it is the biggest upside-down attraction in Russia and allegedly the biggest in the world. Visitors to the Flip-Flop House get a chance to see life from a totally different vantage point. The Flip-Flop House offers two stories and over 3,000 square feet of exploration for more than 50 people at a time. Every single item has been carefully made to fit into the upside-down world.