Chepstow (Welsh: Cas-gwent) is a town on the Wales—England (Monmouthshire—Gloucestershire) border, situated at the confluence of the River Wye and River Severn on the Severn's west bank. It is famous for its castle and racecourse, which hosts the Welsh Grand National. Chepstow proper is on the west bank of the Wye, within Wales; the English part on the eastern bank consists of Tutshill and Sedbury.