The Cleveland Museum of Art has one of the most amazing collections we've seen, and we've been to many if not most of
the great art galleries in the US and Canada. Something from every era and for every taste.
http://www.clevelandart.org/
Our reactions to the Rock & Roll Hall of Fame were, um, mixed...
http://rockhall.com/
If you've got kids along with you, the Great Lakes Science Center [
http://www.greatscience.com/ ], right between
the Rock & Roll Hall and Browns Stadium, will keep them happily occupied.