There are a few interesting dioramas like this one with a 1901 Breer, a steam engine car built by 17-year Carl Breer in his father's blacksmith shop.
The Peterson is more than a collection of cars and their history, however. There's a lot of information on how cars have affected and shaped our culture with gas stations, strip malls, drive-in theaters, insurance, roads, highways, taxes, muscle cars, racing, etc.
On the 2nd floor, there are special exhibits, at least some of which are temporary. Alternative fuels was the subject of one of the exhibits. There was an electric car from 1897 and a new electric car of 2010.
Here's a 1974 Dutcher which runs on steam. This one is from the Jay Leno collection.
And here's a 2005 Nissan fuel cell car.
There are some famous Hollywood cars, including a 1989 Batmobile.
One of the special exhibits was on Scooters.
Another special exhibit was a tribute to Phil Hill, a legendary American racing champion. He also collected and restored cars like this one which was my favorite car in the museum, a 1912 Packard which won a Best in Class award at the prestigious Pebble Beach Concours d'Elegance.
Of course, no auto museum is complete without at least one old or otherwise unique RV. This is a 1938 Curtiss Aerocar.
It's pulled by a 1938 Reo. Both of these are one of a kind.
Other auto museums I've been to which you might be interested in:
In Las Vegas, the collecton at the Imperial Palace is billed as the world's largest classic car showroom.
If you like Ferraris and race cars, check out the Marconi Museum in Tustin, CA.
If you're in San Diego and visiting Balboa Park, the San Diego Auto Museum is a small but worthwhile collection to take a look at.
And one of my ALL-TIME FAVORITES is the Nethercutt Collection in Sylmar, CA. They also have the most elegant website. Check it out.