World 5 (Super Mario 3D World)
From the Super Mario Wiki
World 5 is the fifth world of Super Mario 3D World. It is a purple, beach-like island. It contains seven standard courses, two Enemy Battles, a Captain Toad's Adventures course, a Castle, a Sprixie House, a Warp Pipe to World 1, a Warp Pipe to Coin Express, and a warp pipe to World 3-B. After defeating the boss, King Ka-thunk, the purple Sprixie Princess will create a Clear Pipe to World 6.