PSA: You can get into Vent Gardens by swimming through their mouths.

[Osamaru]

I was slightly surprised they let you do this.

https://media.discordapp.net/attachments/449656835222405138/844112137726066728/unknown.png?width=1202&height=676

[Coops]

Its been like that since they were added to the game. There are resources inside you need to make advanced materials.

[Ballsaque]

Originally posted by Coops:

Its been like that since they were added to the game. There are resources inside you need to make advanced materials.

Those resources (Redwort and Spiral plant) are also available outside of the Vent Gardens.

Vent Gardens are great waypoints though!