While not quite Wacky Races, the Royal Automobile Club's annual Veteran Car Run is probably the largest collection of unusual looking vehicles you're ever likely to see. 

The world's longest running motoring celebration has been held almost every November since 1927 and attracts entrants from around the globe eager to test their vintage vehicles on the historic 60-mile run from Hyde Park in London to Brighton's seafront.

 Some 500 pre-1905 cars attempt the trip, all of them a huge draw for the throngs of spectators and tourists who line the route to cheer these often slow-moving machines onward to the finish line.