Two are entered from The Dubai Mall, beside Burj Khalifa: Dubai Aquarium & Underwater Zoo, whose tunnel is on the mall's Ground Level, and At the Top, whose entrance is on its lower ground floor. That makes them an easy pair for one hot afternoon.
The rest are spread across the city: Ski Dubai on the ground floor of Mall of the Emirates, Aya Universe at Wafi City, The Green Planet at City Walk, Madame Tussauds Dubai on Bluewaters, Lost World Aquarium at Atlantis, The Palm, Dubai Dolphinarium at Creek Park, Gate 1, and IMG Worlds of Adventure on Sheikh Mohammed Bin Zayed Road (E311), next to Global Village.