Travel Town is part of the Los Angeles Department of Recreation and Parks. It is located at 5200 Zoo Drive, Los Angeles, CA, in Griffith Park.
Travel Town started out as a possible addition to the existing miniature train ride already at the location in the late 1940s. It was a fortuitous time to be scouting unwanted steam locomotives, as all the major railroads were moving to diesel power. The collection has some interesting locomotives, mainly from railroads that operated in the western US from the 1880s to about 1930. The museum was formally dedicated on 14 December 1952.
I have visited a couple of times and the photos on this page are from both visits. There is plenty of parking right next to the museum and there is no entrance fee. However, this is another museum with a no-camera-tripods policy although, because the collection is largely housed outdoors, that shouldn’t be much of a problem. The museum can also get quite crowded, so get there early to get unimpeded shots of the equipment.