Wind Tunnels & River Current from The QuakeLab is a Single Player level. There is no in-game name for this level, the name comes from documentation included with the file.
Walkthrough
As you spawn into the level, an invisible Wind Tunnel will push you along a pool of Water. Near the opposite end, you will hit a secondary Wind Tunnel, which will deposit you in an empty room.
Gallery
Wind Tunnels & River Current from The QuakeLab