Cities close to Stockholm to visit in a day [closed]

I think that this question will be closed as primary-opinion based, but still want to add that the best way to investigate a country is avoiding the trourist traps and select not first option you can find.

I suggest you the Eskilstuna city, there are a lot of museums there, zoo and park recreation zone you can walk in, and it is situated not very far from Stockholm: SJ (the largest train operator in Sweden) site is giving travel time near the one hour from Stockholm.

Some inspirational photos here:

Yes - Eskilstuna is a nice option. The obvious ones near Stockholm (that some may consider tourist traps) are:

• Vaxholm (reachable by bus or boat)
• Mariefred (with the interesting Gripsholms Castle)
• Sigtuna (old city with several medieval church ruins)

Other options are:

• Uppsala (with a cathedral and old royal burial grounds)
• Strängnäs (nice old small city centre next to Mälaren with old church)
• Norrköping (if you like old industrial areas this is a must)
• Trosa (small coastal - not reachable by train though)
• Arboga (small and cozy by a canal)