San Diego Aerospace Museum

The picture shows the cockpit of a DC3.

The aeroplanes are displayed in chronological order in a donut shaped hall. That makes it easy to walk through without missing anything.
The hall is jam-packed with exhibits, so you can get very close and touch most of them.

Each period of aviation is well represented by aircraft that have not been over-restored.

My favourites were the Mark XVI Spitfire and the cut-away radial engine that shows how a radial works(video coming).