The fort baths have possibly the best preserved hypocaust in England. They are visible and incorporated into the Museum.
http://www.u3ahadrianswall.co.uk/wordpress/binchester-roman-fort-vinovia/
http://roman-britain.co.uk/places/binchester.htm
http://www.aasdn.org.uk/binchester.htm
https://en.wikipedia.org/wiki/Vinovia