The headline attractions sit within a few tram stops of each other, and the thing most visitors miss is that the same transport network also carries you out to car-free islands.
Liseberg
Sweden's largest amusement park, open in seasonal blocks through the year including Halloween and Christmas rather than only in summer. The big coasters are Balder, Helix and Valkyria, with Stormvåg added in 2026; bundled entry-and-rides packages start around 895 kr, and a water park called Oceana opens in early 2027.
Universeum
Sweden's national science centre: ten floors covering a rainforest hall, aquariums, reptiles, space and chemistry, plus Wisdome, the country's largest visualisation dome. Open daily 10:00–18:00; an annual pass is 545 kr for adults and 395 kr for children, which pays off quickly if you visit more than once.
Maritiman
A floating museum of historic ships moored at Packhusplatsen 12 in the harbour, which you board and climb through rather than look at from a walkway. Central enough to combine with the Opera and the waterfront; check the hours page first, as they change by season.
Göteborgs botaniska trädgård
Carl Skottsbergs Gata 22A, roughly 20,000 plant species from about 130 countries across a large hillside site. The garden is open every day around the clock on a voluntary 30 kr contribution; the old greenhouses are shut while new ones are built, but the Berg House and the bulb garden are open.
The southern archipelago from Saltholmen
Tram 11 runs to Saltholmen, where Västtrafik's ferries carry on to islands such as Brännö, Styrsö and Vrångö. They are effectively car-free, so it is walking, swimming and a café or two — a half-day trip costing little more than an ordinary transport ticket.