Had two when I was a kid. One I found at the back of the local fire station. Parents tracked down the owner and they let us keep him (or her as it turned out to be many years later). The second belonged to our cousins. It escaped from their garden and turned up some years later (phone number still visible on shell) and we got that one as well.]
Ours had the run of a large patio and flower bed outside. They were great pets
A friend in London just bought two captive bred this year and is keeping them inside in a wooden box with heat lamp.
Isn’t there some dispute as to whether they should actually hibernate (ie putting them in a box for half the year isnt a good idea?). One of ours died over a winter, the other escaped.