Fountain

The Fountain (Bathroom in non-English editions) is a dome in Super Mario Galaxy. It is the second dome that Mario or Luigi can unlock, provided he recovers the Grand Star from Bowser Jr.'s Robot Reactor.

The exterior is made of white stones and has water spouting from the sides. The interior has blue tiles and water running through it like channels. Polari describes the dome as being very relaxing. As with all domes, the Fountain has a Pull Star in the center which is used to access its Galaxies.

Bowser is the main boss of the Fountain.