In Spain, Caroline and Piers see a farmhouse made of steel, a home with a floating pool, a circular sanctuary anda shared dwelling for three sisters. 　　A tour of India includes an airy fortress, a fluid home with origami-like roofs, a new take on a tea plantation house and a lovely "patchwork" property. 　　Piers and Caroline travel to Norway to see a charming family cottage, a summe...