411 REFERENCE · Wikibooks
Super Mario 64/Cavern of the Metal Cap
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Location: In level 6. Go to the underground lake, and ride the blue sea beast to the door across from where you came in. The metal cap course is in the pool inside.
Description: Long level with a strong current. Don't get sucked in to the waterfall; you'll end up outside.