Home > Themes > Secret Garden. Party Themes. Look for different ways to throw a party with PartyPOP's party themes and ideas. Just type in the event or theme you would like and get great ideas. Secret Garden. For years, the senior prom has been held in the school gymnasium. No matter how you decorate, it still looks like a gym. Secret Garden Themes & Ideas â€“ PartyPOP US Please note: You are currently browsing img karas party ideas mini stacked cakes macarons from a that is 700x1049px in size. This image is listed in secret garden theme party decorations category. Secret Garden Themes Ideas PartyPOP US, 700x1049 in 88.96 KB.