At each end of the course were three conical pillars (metae) to mark its limits.
It is now and then stated that the metae between strips have been plowed up.
self-referential; referring to itself or its characteristics, esp. as a parody; about
That book is so meta.
something with refers to itself, esp. in self-parodying manner
A movie-within-a-movie is an example of meta.