why is "skildpadden startede at svømme..." wrong ?
What does svømmebad means?
Not a word I would usually use, but it means "åbent eller overdækket offentligt anlæg med svømmebassin(er)" = open or roofed public grounds/park with swimming pool(s)
Source
Ok, so it doesn't necessarily means swimming pool. I thought they were synonyms. Thanks.