I lived there for most of '05. There's a lot to do there, but it can be pretty miserable in the winter. Decent weather now though.
...in/near Downtown Cleveland...
- Warehouse district. Tons of restaurants, clubs, bars, etc. It's packed on a Friday, especially when it's game night.
- Flats. Mostly bars, but there's a club called Christie's that's absolutely fantastic. Look it up 🙂
- Rock 'n Roll hall of fame. Fairly interesting, sits right on Lake Erie.
- Science Museum. I think that's what it's called. It's right next to the Hall of Fame. Had a great time there.
... Outside of downtown...
- Little Italy. Great restaurants. Interesting atmosphere. It's about 5 minutes east of town. Grab a map.
- Their orchestra is one of the best in the US. Not sure if you're into that, but I went pretty much every week.
- Museum of art. They have one of the best museums in the US.
- See Lake Erie. Not that much fun, but might as well check it out.
That's all I can think of at the moment.