From My wiki

[edit] Info

Chaos Gates are in Root Towns. They allow players to leave the safety of towns to find areas. While in these areas they will need to find items and defeat monsters to survive. You can access the menu by pressing F6 or typing /gate.

The Chaos Gate that is located in the the Theta Server: Tuatha De Dannu

[edit] Random Field

Currently disabled due to safety reasons, this button allowed the more adventurous players to visit a random field in The World.