Outside the walls

[hoboof97]

http://prntscr.com/8h71i9

When you walk into this corner you can walk outside the boundaries. Haven't looked anywhere else to see if it works in different places.

 

[CatBug]

In the Temple of Seasons, in this area you can get outside of the area

To do so, just run down the wall from the left side of the stairs and go left through the bushes, this will take you outside of the map.

Once outside, you can walk through the walls forever unless you leave the area or touch the bushes again. You will nolonger be able to hit enemies (unless theres some kind of DoT thing like the flames from my meteor) and they will not be able to hit you, though they sometimes aggro onto you.

Edit: Another Pic
PS, stuck on the next boss atm welp