There are likely some car museums in LoCal, to check out. Maybe the locals on here know the better ones.
Also, not so ALFA specific... if you are around Pasadena, you may want to go visit the Art Center College of Design campus on Lida Drive (just above the Rose Bowl). They always have a great gallery of student work in the lobby. 85% of the world's car designers come from Art Center. So, you'd have a peek at what cars may look like 25 years from now. Drawings and models.
You'll also find examples of future Product Design, Packaging Design, Environmental Design, etc. If you want to see more than you find in the gallery, you can troll the halls peeking into the class rooms... best to do that at lunch break when class is not in session. Plenty of drawings lining the walls!
Doubt you'll be able to just walk into Jay Leno's property to check out his massive collection. That would be a hoot! Maybe someday he'll have a museum to house those, for the public?