I made the interior myself for my corn, not quite 100% finished yet as I sill want to add some decoration to it but my corn seems to like it!
You can see there's a snake cave on a ledge on the right and on the upper left, a nice big ledge in the middle which JD seems to like chilling on and another rather large hide I made on ground level as well as the gap underneath the right hide.
This is JD, the resident...
Should look nice once properly decorated!