Texas World Speedway is a fun course. I cut my teeth on that course a few years ago, driving in the John Eagle Honda events that were scheduled out there every summer.
It's even more fun if you've got a fast car, since almost a 1/2 mile of the big oval's front straight makes up the track between Turn 15 & Turn 1 (at least in the configuration I'm most familiar with). The transition from banking to flats at Turn 1 is abrupt, and can be very interesting indeed... especially in a powerful car. My old FD RX7 would hit 140+ mph coming into the braking zone for Turn 1, when it was running well.