I've seen that chariot race picture before and have always figured where it comes from... Anyway, that's badazz multiplied.
There has been pictures like this shown around before. I think they are from the Sydney, NSW, Australia Easter shows in the 1930/40's.
Looks to be the old Speedway in Sydney...those timber surrounds did a lot of damage to plenty of Speedway riders back in the day... took quite a few lives too but I remember seeing some lovely bikes run around there...not quite back this far though.
Agreed. Looks like the old Sydney showgrounds speedway. Spent many a night there and Liverpool speedway growing up, cheering on Billy Sanders who was a close family friend.