This is the second world of New Super Mario Bros. ULTIMATE. It is desert-themed and has a large pyramid in the middle. There are a few oasises, too. This world contains the first switch palace in the game, the red one.
Dry Dry Desert 1
The secret exit in this level unlocks a Toad House and World 2-A, which then opens 2-4.
Desert Secret 1
Dry Dry Desert 2
Dry Dry Desert 3
Secret Exit 1
This level's secret exit unlocks the cannon, which shoots to World 5. This is not accessible without the Red Switch being hit.
Secret Exit 2
The second secret exit unlocks World 2-6 near the pyramid's summit.
Dry Dry Desert 4
The second exit unlocks World 2-B and 2-6. B leads to the airship when complete.
Dry Dry Desert 5
Desert Secret 2
Dry Dry Desert 6
The secret exit unlocks the Red Switch Palace.
Dry Dry Desert 7
Red Switch Palace
Mario starts outside a small shack owned by Toad, who tells Mario that there is a surprise inside. Mario heads inside, where he hits the Red Switch turning all dotted red blocks into Red Blocks. Mario is sent outside and Toad opens a path to the castle, and to the fortress where Toad says a secret exit is now open (see above).