I might visit Stockholm on one of the upcoming bank holidays (4 days).
Next to explore the city itself I would also like to get out of it for 1 day.
I'm interested in nature. I would like to hike and enjoy some nice landscape. Up to about 6 hours of demanding walking would be fine.
I already saw that Färnebofjärden National Park, Ängsö National Park and Tyresta National Park are the closest to Stockholm. But I can't tell if they can offer what I'm looking for or if there are also other places which would fit better. If you could also provide information about how to get there easily and what signature trail you would suggest that would be greatly appreciated.