Complying with the bonds of the mobile villa, by virtue of its transportability, we have used light and eco-sustainable materials like wood, recycled aluminium, stone veneer. Shapes and materials specially conceived to capture sunbeams, high thicknesses of thermal insulation and a right orientation of the houses on the site allow to obtain low energy consumption so as to be self-sustaining. Distributive flexibility, transparencies and refractions, materials and colours are the secrets that perform this small miracle of interior architecture for these mobile villas in a resort in Milan. The environments are conceived as an open space. A large living area is open onto the external nature. Mobile walls and manoeuvrable glass panels allow to configure a large suite for a couple or to subdivide the area into more separate rooms for a family. The relation between interior and exterior is mediated by a wide wooden terrace where a hot tub protected by a pergola is located. Why be stuck in a hotel room when you can enjoy a real holiday home with a terrace and private garden in the heart of Milan?