- Watch the Dubai Fountain in Downtown: shows every evening on the lake beside the Burj Khalifa, with music and lights.
- Swim at a public beach: JBR, Kite Beach and La Mer are free, with showers and lifeguards on many stretches.
- Explore the Al Fahidi Historical District: the old wind-tower neighbourhood of Bur Dubai, with lanes, courtyards and small galleries.
- Browse the souks: the Gold Souk and Spice Souk in Deira (looking is free; bargaining is expected if you buy).
- Cross Dubai Creek by abra: not quite free, but only a few dirhams for one of the best views of the old city.
- Walk the Dubai Marina promenade and see the yachts and towers, especially at sunset.
- See the Burj Al Arab from the public beach next to Madinat Jumeirah.
- Visit Expo City Dubai, where many outdoor areas are free to walk around.
- Spot flamingos at the Ras Al Khor Wildlife Sanctuary hides (cooler months).
- Window-shop the mega malls: The Dubai Mall's aquarium tank and waterfall can be seen from the mall itself.
Rules and opening times can change; check official sources for beaches and heritage sites before you go.
More ideas: Dubai attractions by area and a 3-5 day itinerary.