Today we continue our photographic tour of the San Diego Auto Museum. Despite the fact that the building is dedicated to four-wheelers, there are actually more motorcycles there than cars. That's alright with us, as the bikes on display are some of the coolest machines that history has to offer. Starting with some of the earliest cycles powered by rudimentary engines, it's easy to see just how far we've come in just about one-hundred years or so of mass production. Take a gander at some of the first motocross bikes, land speed record racers, rotary-powered cycles, modern choppers and scooters (including one from Harley-Davidson) in our gallery below. Our personal fave? That would be the 1951 Vincent Black Shadow.

While on a recent trip to San Diego to ride some dirtbikes, we decided to check out some the sights that the city had to offer. Of course, being the car-obsessed nerds individuals that we are, it didn't take too long for us to end up at the San Diego Automobile Museum. Tomorrow, we'll bring you the best of what we saw on two wheels, but today is devoted to the cars. From some of the earliest four-wheelers (and three-wheelers) right on through to some Italian exotics from the '60s, '70s and '90s, there was plenty there to keep our interest. Our favorite has to be the rear-engined Tucker from 1948 -- very cool. We've assembled a gallery of pics below and have captioned them where appropriate.