Only about two weeks to go to one of the most unique National Capital Tracker Train shows, the Holiday Trains and Planes at the College Park Aviation Museum, College Park, MD. website
The Nation's, no, maybe the World's, oldest airport provides the opportunity to see planes taking off and landing while O-Gauge trains run among the historic exhibits.
Dates and times are December 12-19, 10 AM to 5 PM, 3 PM on the last Saturday.
Here's a few photos of some past years' shows.