Training Chamber (Chozo Ruins)

Training Chamber is a room in the Chozo Ruins region of Metroid Prime.

Secret World

Upon entering Training Chamber, face the Wave Beam door and jump toward the tank to the right of the door. Turn 180, and jump toward the circular piece of debris sticking out of the vertical piece on the wall. Then turn and jump toward the low part of the ceiling which is next to the other vertical piece of decoration.
This was secret world #11 in the original numbering scheme.