Newer Super Mario Bros. Wiki
For the towers in Another Super Mario Bros. Wii, Newer: Holiday Special, and Newer: Summer Sun that share the same icon, see here.

Fortress are a type of level found at the end of three of the five secret worlds in Newer Super Mario Bros. Wii, worlds A, B, and D. They look no more like castles, but they share a different icon, using the original tower icon from New Super Mario Bros. Wii. As they appear only in the secret lettered worlds, no fortress has a boss at the end and they all end with a Goal Pole.

List of fortresses

Newer Super Mario Bros. Wii

Goldwood Forest

Mini-Mega Island

Crystal Sewers

All items (3)