Frognerparkern, Vigelandsanlegget, Frogner, Oslo. Little under knee high curbs. A gap in the end. The preffered spot of many Oslonians. :)
Take the tunnel bane to the Majorstua T-bane station. You can also take the trolley to the Vigelandsparken Trikk station. When you're inside the park, look for the big fountain. Go there.