Everyone knows the various AMRC track designs and many are familiar with track designs from makers like Engleman and others, but there have been over the year some very interesting one-of-a-kind track designs created by individuals and clubs.
This thread is a place to post pictures of these relatively unknown designs here.
Here's one I snagged from Facebook. It's a four-lane club track that was in Aintree in the UK IIRC. Perhaps some of our UK members can provide more info.

Who's next?