Beamish museum probably needs little introduction these days. I've been visiting it since the 1970's and it's certainly grown a lot in that time.
On this occasion I failed to do the whole thing in one day - fortunately the entry is for a full year so I could go back a second time. Time spent in the pub probably didn't help, although I enjoyed the beer and the crack.
The museum website is at http://www.beamish.org.uk