If you visit between November and May, Miracle Garden earns its slot — there is nothing like it elsewhere, and visitors consistently rate it a trip highlight. Go on a weekday morning; the flower structures photograph best in soft light and thin crowds.
Skip Miracle Garden math entirely if you travel June to October: it is closed for the season, and no substitute matches it. Summer visitors should redirect that time to indoor attractions — the aquarium, malls, or IMG Worlds.
The public parks are worth an honest word: they are pleasant, not sights. Use Zabeel or Creek Park the way residents do — a cool-evening breather with snacks — not as a destination. Families can chain Garden Glow (in Zabeel Park) after a park evening in winter. See also theme parks in Dubai for indoor days and the Dubai guide for season-by-season planning.