In this special episode, George revisits some of the finest builds from across Europe. There’s an epic mountain-top retreat in the Italian Alps and a glass-walled lake house in Lugano. There is also an ingenious bed in Gelnhausen, Germany and a floating home in Denmark partly made out of recycled debris. And in Barcelona, George visits possibly the smallest city home he’s ever seen – a 24-square-metre roof top studio apartment where everything is hidden in the walls.