Here is a lovely example of the Tennessee state wildflower, the passionflower. These extraordinarily exotic-looking flowers grow on small vines pretty much anywhere you will let them. This is one of a few vines growing along the side of the driveway.
After the blooming period ends, these vines will produce small green fruits with a smooth, tough rind that are mostly hollow inside. They are shaped a bit like watermelon, but obviously much smaller. You can usually find these pretty wildflowers in the same places each year.