The Monte Rosa hut

I've been keenly waiting to see the finished Monte Rosa Hut in Swtizerland since I saw the first design illustrations, and the building is now finally finished. This Swiss mountain hut, a five-storey timber frame building on steel foundations, is designed to be 90% energy self-sufficient - it boasts an 85 square metre solar PV array with excess energy stored in "lead-acid accumulators". There's more details here and here. Photos courtesy of ETH-Studio Monte Rosa/Tonatiuh Ambrosetti.