Bowser in the Fire Sea
Bowser's lava sea
At the beginning of the sea.
Series Mario
First game Super Mario 64

Bowser's Fire Sea an area that needs 30 Power Stars to enter in Super Mario 64 and Super Mario 64 DS. It is like Lethal Lava Land except Bowser awaits at the end of the level. When he took away Princess Peach, he flooded the castle basement with lava and set up his base. Mario then defeated Bowser, received the key and went on to the top castle after defeating Bowser.