The Sacramento Museum has a very rare Lobaugh Cab Forward on display with no descriptive material at all. It has a Lionel 700E likewise on display. It would take fifteen minutes to type up a 3x5 card for each. The rest of their model trains are somewhat commonplace, except for the large live steamers.
The San Diego Museum has, as I understand it, $35,000 worth of early O Scale imported brass, donated. It is kept under lock and key, where it cannot be seen. That may have changed in recent years; traffic and parking issues have made me not wild about visiting.