I really liked Herman Melville's Moby Dick, except the chapter on the dimensions of whale bones. I tried to read it, but couldn't. I skipped it. 

The Count of Monte Cristo by Alexandre Dumas is one of my favorites! 

And 20,000 Leagues Under the Sea was also really good. 

Ivanhoe by Walter Scott was a good one. A lot of the themes from Robin Hood are in there. 

Those are a good start of my favorites. Have you read any of them?