Last night I let Mr Burrows out again while I cleaned tank & decor and changed substrate.
But this time I kept an eye on him and found out that there's space between radiator pipe and wall that he can squeeze through to get from living room into bedroom.

I only have the one snake, think of him as a pet, and don't have the heart to confine him to a tiny enclosure for his entire life, but of course I don't want to have him disappear! I can plug that hole so he stays in the living room but even this area is pretty small and restricted, so I'm trying to think of some way to create a play area or some type of maze that he could crawl through and could be changed periodically.

Has anyone else done anything like that or am I as usual overthinking things.