Södertälje is a small city just south of Stockholm, known for the Södertälje Canal and lock — the largest lock in the Nordic countries — which connects Lake Mälaren to the Baltic Sea. The city has a long industrial history as the home of Scania trucks and AstraZeneca.
For visitors, the main draws are the open-air museum Torekällberget, which recreates a 19th-century Swedish town with original buildings, and Tom Tits Experiment, a hands-on science centre popular with families. The waterfront area around the lock is pleasant for a walk.