An open air museum in the south of Norway planned to make an underground cart-shed to save space on their premises. The winter climate in Norway can be extreme with temperatures down to -35 ° C. The conservator suggested that with good isolation, the temperature in the ground would be stable and high enough to provide a suitable storage climate without heating. A small, compact air conditioning unit circulates the air and controls the relative humidity level. The store has been in use throughout one winter season, and the result so far is very promising. A small provincial museum in the western province of Zambia is supported by the Norwegian development agency. Unfortunately it was constructed without storage facilities. The conservator at the Ethnographical Museum in Oslo was connected to the project, and suggested underground storage to save space and control the environment, although the temperature conditions in this project were quite different from those of Oslo.Details of these two projects are given in the article. -- AATA