Slovakian architects Tomas Zacek and Igor Zacek have come up with a unique house design that manages to combine a love of travel with environmentally sustainable design and functionality. The architects used the caravans for inspiration, but added their own modern eco-twists.

The Rolling Stone is designed to accommodate a minimum of two people or a maximum of six in an emergency. Each unit has a bedroom with a double bed, small closet, toilet, shower and sink. The main part of the unit has two separate functions. In summer, the unit can be expanded to create living room space with a kitchenette and eating area. The open area may also function as a workshop area or theatre. As with traditional caravans, when several are placed in a circle it creates a communal living space for outdoor cooking and socializing.

Each unit continues different energy system options – wind turbines or solar panels. The units also have a water reservoir and bathtub combination area on the roof and a grey water treatment facility under the floor of the caravan.