George Clarke's Amazing Spaces: European Design Special

The architect and presenter revisits some of the finest builds from across Europe, with 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. Plus, 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