Torekällberget is Södertälje's open-air museum, spread across a wooded hillside above the city centre with original 19th-century buildings moved here from across the region. The collection includes farmhouses, barns, a windmill, a merchant's house, and various craft workshops — arranged to give a coherent picture of how people in this part of Sweden lived before industrialisation.
In summer the site comes alive with demonstrations of traditional crafts — blacksmithing, weaving, pottery — and there are farm animals for children. The views over Södertälje and the canal from the hilltop are good. In winter the museum is quieter but still open, and the buildings look striking under snow. Admission is free or very low-cost.