This is open right now in Fjärdhundraland! Here are several offers for those who want to make an excursion, near Stockholm, Uppsala, Enköping and Västerås.
At each site, there is info on what action they have taken concerning Corona / Covid-19. Generally, there are good opportunities to keep distance and avoid infection. Also, consider yourself to follow The recommendations of the Public Health Authority. Stay home when you are sick. Pay attention to symptoms of COVID-19. Wash your hands frequently. Cough and sneeze into the elbow. Keep distance.