http://www.boredpanda.com/cat-transit-system/

People have done some similar but less robust things for ferrets. Given
infinite money -- which will never happen in our case and with our
favored charities most easy come money would leave here anyway -- it
would be great to have custom furniture with accessible, built in
ferret tunnels that are not ones they create by digging, and to have
an accessible pipe system that is this pretty in a room dedicated to
the ferrets, wouldn't it?

[Posted in FML 7923]