How can I make it more obvious that a card view needs to be clicked?

We have a booking platform where users choose different types of activities to do in their area, But when users go to search page only 52.9% of them continue to activity page which made me think that some users don't know that they have to click on card view to go to activity.

The obvious easy solution here is to just add a Book button under each activity but that would look so duplicated and will make website look bad.

What else can I do to make it more obvious that the card view is clickable and they must click it?

Screenshot for search page

For reference this is how only 52.9% of traffic reach activity page : enter image description here