We had a couple days off from school so on one of those days we took a day trip to the Santa Cruz. Natural Bridge State Beach is one of the 4 places in America that monarch butterflies migrate to for the winter and we wanted to see them. It was cold and cloudy, so it was very hard to see them high up in the giant Eucalyptus trees, but they were there. We could see them fluttering around up high and what looked like leaves on the branches were actually clusters of butterflies. The butterflies like this Eucalyptus grove because it's in a valley and the trees and the cliffs shelter them from winds and rain.
The grove is right on the beach and at the edge of the grove is a sandy beach with a natural bridge carved out of the mudrock cliffs. There used to be 3 bridges but time and erosion has carved away all but one of the bridges. The beach also had some fun tide pools to explore.
We spent a few hours with the monarchs and the beach, but the cloudy day just made it increasingly cold there so we left the beach and spent a little time walking up and down the historic Santa Cruz boardwalk. The boardwalk has the first and oldest beach amusement park, it was closed for the season, but it was still fun to explore without the crowds.