What are the top 5 classic novels worth reading?

Hello all out there, reader of classics, perhaps lover of classics such as I.

 I came across this Quora question today: 

http://www.quora.com/Book-Recommendations/What-are-the-top-5-classic-novels-worth-reading

I encourage everyone who loves classics to take a read. Then comment there or here about what your top 5 list is.