For Kids:

1. Central Park: Features a playground and large open spaces.
2. Santa Clara City Library: Attend free children’s programs and events.
3. Ulistac Natural Area: Explore native plant gardens and walking trails.

For Adults:

1. de Saisset Museum at Santa Clara University: Free admission to view art and history exhibits.
2. Triton Museum of Art: Free admission to view contemporary and historical art.
3. Santa Clara University Campus: Take a self-guided tour of the historic mission and beautiful grounds.

These cities offer a variety of free activities for both kids and adults, from exploring nature and parks to visiting museums and attending community events. Remember to check official websites or call ahead for the most up-to-date information on hours, potential closures, or any small fees that may apply.