Valladolid Science Museum is a modern interactive museum by the Pisuerga River, with exhibitions on science, technology and the natural world. It broadens the city's museum mix beyond churches, sculpture and Columbus-related history.
Families will get the most out of the hands-on displays, but the building and riverside setting also make it a pleasant stop for adults. It is slightly away from the historic core, so combine it with a walk along the river or nearby contemporary architecture.