The River House (Casa del Rio) was first opened in 2007, but it has since been extended to allow more aquariums, terrariums and interactive displays. The house exploits the museum's location on the banks of the
River Pisuerga to explain geography and ecology with reference to the city of Valladolid. The entire ecosystem is illustrated and includes examples of the important species of fish, amphibians and shellfish that should thrive in the region's rivers. Displays illustrate
metamorphosis of frogs and toads. The
water cycle is explained and its importance in a time of climate change. ==Planetarium==