A466 road about long and runs through the counties of Herefordshire and Gloucestershire in England, and Monmouthshire in Wales. It runs south from Kingsthorne, on the A49 south east of Hereford to Monmouth, crossing the A40. After crossing the River Wye at the Wye Bridge, Monmouth and Bigsweir Bridge near Llandogo, it follows a picturesque route south down the Wye valley through Tintern and Chepstow to the M48 motorway at junction 2. The road crosses the border between England and Wales at three places along its length: at Buckholt, Redbrook, and Bigsweir. It runs through an Area of Outstanding Natural Beauty, and
Wales 1536 formed a linear border stretching from the mouth of the Dee to the mouth of the Wye. Even after the Act of Union, many of the borders remained vague and moveable until the Welsh Sunday Closing act of 1881, which forced local businesses to decide which country they fell within to accept either the Welsh or English law. The "Seven Wonders of Wales" is a list in doggerel verse of seven geographic and cultural landmarks in Wales probably composed in the late 18th century under the influence of tourism from England. All the "wonders" are in north Wales: Snowdon