O Scale Railroad Museum
Since I have a wide variety of steam and early diesel models that predate my modern CSX equipment I have created an O scale "Railroad" museum. The equipment on display on my layout "module" will be vintage PRR and NYC steam engines, early vintage PRR and NYC diesels as well as retired M-of-W equipment, passenger cars and retired cabooses. This is a very logical way to display these O scale models. They can also be used for railfan excursions on my layout from time to time.
I have an MTH two stall engine house that will be used for my steam engine collection on display.
My diesel equipment displayed at the O scale museum include PRR F3s, F7s, PAs, Es, GG-1s, Train Masters. NYC F3s, Es, GPs, NW-2s and Sharks. B&O FAs.