The Huntington Beach (HB) Secret Garden is located in the HB Central Park right behind the HB Central Library. All the pictures is these galleries were taken either in the Garden, or in the large pond area surrounding the Garden.
Instructions to navigate this site: If you click on any thumbnail picture that doesn't have 4 dots on either side of the picture name, you will get a full size version of that picture. If a picture does have the 4 dots on either side of the name, clicking on that picture will open up either a series of new thumbnail pictures, or additional sub-categories to click. It's actually easier than it sounds :)
If you ever get lost in the navigation, click on any of the links along the top of the page. Feel free to look at anything else on the site that may interest you. Make sure the word 'original' is clicked in white below the pictures.