Are face masks mandatory when visiting the parks?

The Netherlands
At our Dutch parks it's mandatory to wear a face mask in all public places in and around the parks.

Are you visiting the Wadden Islands? Please make sure you wear a face mask when you travel by boat. The ferry to the Wadden Islands is also a public transport. 

Germany
At our parks in Germany its mandatory to wear a face mask in all public places in and around the parks. 

Austria
In Austria it is mandatory to wear a face mask in banks, restaurants, public transport, mountain lifts and all medical facilities. In additon, masks must be worn if a minimum distance of 1 meter cannot be maintained. This rule doesn't apply to children under an age of 7 and people with certain illness.