Is it permissible for husband and wife to eat in a restaurant and take a walk in a park?

Answer

Any outdoor activity in conflict with the Shariah is haraam. It is not permissible to go to restaurants and such places where there are men and women mixing. If you are in the park at a time when there are no other people, it will be permissible. But if there are others present it will not be permissible. Since it is rare for the park to be without people, it will not be permissible to visit it.