Alcove
Alcove is a room in Tallon Overworld. It can be accessed by boosting up the half-pipe in Tallon Canyon and entering the Morph Ball tunnel with bombs then going through Gully.
Alternatively, it can be accessed with a Dash Jump from the ship, as done in most speed runs. NTSC 0-00 and 0-01 use a Scan Dash from the ship and PAL uses a Combat Dash off the Seedlings in Temple Hall.
This room holds the Space Jump Boots. This item allows the player to perform longer dashes, R-jumps, R-dashes, and generally move much more quickly throughout rooms. Though low% skips this item, it is so invaluable that the any% and 100% speed runs pick it up immediately upon landing on Tallon IV.