I fucking love O'Neill Cylinders
@starwall to be honest, looking outside it might be way too dark to really see, and insofar you do see, it rotates bit too fast.
And it is a giant window you have to engineer... Think just a closed cylinder with a concentrator feeding light at the end might be better..
Totally second people saying this is better than Mars. It's way better...
Imagine living in "zeppelins" basically, wires hang ~100m overhead, and "houses" hang on them and can move around. But that's for really low pop density.