MarioMario54321 in the Fourth Road.
The Fourth Road is a location in the Fourth Dimension, first appearing in MarioMario54321's Super Mario 64 Bloopers movie Into the Fourth Dimension. It is very colorful, with a variety of mushroom hills, a UFO and a field. This is the place where people can enter Bob-omberman's Factory. It has some several Bluebas and Bob-ombs, and also can be accessed by a cannon in the 4D Tower.