Hotel Ryttergaarden on the Danish island of Bornholm is becoming one of the most eco-friendly hotels and conference centres in the world, thanks to skillful risk-taking. It will reopen as Green Solution House, one of the most ambitious eco-friendly construction projects the world has seen so far, designed by Steenberg Architects. Dedicated to the philosophy of cradle-to-cradle, the idea is for all natural resources to be preserved through reuse upon reuse. This is a pioneering project that could lead the way and become the architecture of the future.