Skansen is indeed delightful. I was only able to spare three to four hours to visit, so I didn't see everything but certainly got a flavour. I think all open air museums are rooted there; those you mention FG and close to my heart Beamish in County Durham close to where I grew up. The Pangolin at San Diego was special in the way it was shown. There was a keeper talk every day with the Pangolin, out in the keepers arms or on a wooden stand. It was a privilege not only to see one but to see one up close, without barriers and very active. I certainly felt part of a special club of people 'in the know' who gathered in a far away corner of the children's zoo for the presentation.