This Barcelona apartment has been named World Interior of the Year at theInside Festival in Singapore. This apartment is a holiday home of two brothers, who live in Hong Kong. I love this floor designed by by London studio David Kohn Architects. It is covered in triangular tiles that gradually change colour from green to red across the space. The gallery suspended obove the kitchen creates the bookshelves for an informal library and the corridor leads to two bedrooms and their en suite bathrooms.