Avoid Blenheim at all costs. Truly awful. You're shepherded into groups and made to wait until the preceding group is sufficiently ahead of you. Then you're herded up some stairs and before you know it you're trapped in a godawful, one-way, stuffy, crappy audio-visual/animatronic hell. The Story of Blenheim, as badly told at (not to) groups of increasingly bewildered and frustrated tourists many of whom are foreign, speak little English, and evidently found it all baffling. In the end we made a run for it - but the only way out was to push on through the rooms ahead, past the other groups. By the time we got out we'd picked up about ten other escapees.