The Dancing House in Prague, the masterpieces of Gaudi in Barcelona, the leaning tower in Pisa - these buildings have long become the hallmarks of their cities. But architects all over the world compete in ingenuity and put into life the most incredible ideas. SkyScaner chose 15 of their amazing and bizarre creations: from "drunken houses" and clay castles to buildings with rooftops and swollen facades, which Newton's laws do not seem to have written.