This is for a lot of 8 vintage amateur shot 35mm slides from Marineland of the Pacific which was located on the Palo Verdes Peninsula Coast.  These have no date stamps on the borders, but many have "Marineland 7/57" in pencil, dating these from 1957. Marineland opened in 1954, so these are from its third year.  Please note that these are slides and not printed photos.