This is an update of the route for All Towers, thanks to DCA for improving it.
World 1 (1.0)
1-1 1-2 1-Mushroom House (get star and backup prop) 1-3 Secret 1-3 Normal (interchangeable between here and second w1 visit) 1-Cannon
World 5
5-1 5-2 / 5-3 5-Tower 5-4 5-Ghost Secret 5-Cannon
World 8 (1.0)
8-1 8-2 Secret 8-2 Regular 8-7 8-Ship 8-3 8-Tower
Back to W1 after finishing 8-T
World 1 (2.0)
1-3 Normal (interchangeable between here and first w1 visit) 1-Tower 1-4 1-6 1-Castle
World 2
2-1 2-3 2-Tower 2-4 Secret 2-Castle
World 3
3-1 3-2 Use star 3-Tower 3-4 Secret 3-5 3-4 Regular 3-Castle
World 4
4-1 4-2 4-Tower Secret 4-Tower Regular 4-Cannon
World 6
6-1 6-3 6-Tower 6-5 Secret 6-Castle 6-Ship
World 7
7-1 7-2 7-3 7-Tower
Go to World 8
World 8 (2.0)
8-Castle