Pick this place

Looks very much like one of the many wombat burrows on the Nullarbor

A couple more photos

Very interesting Reggy and certainly worth a photo or two. There's a decent wombat village adjacent to "London Bridge" not far from Queanbeyan NSW, but no grand entrances like that.

Not sure if google will turn up anything but I remember reading a long time ago about a bloke who was caught in a blizzard in the Snowy Mts and who survived courtesy of finding a large wombat hole he was able to crawl into - replete with wombat initially iirc. Lucky bloke. Hope he left the wombat a tip.