Plas Newydd is a country mansion and estate of over 150 acres, set on the banks of the Menai Strait near Llanfairpwllgwyngyll (no, I have no idea how to pronounce it 😆) with far reaching views over to Snowdonia. First built in the 14th century the house was redesigned by James Wyatt in the 18th century and was home to the present Marquess of Anglesey, now under the care of the national Trust.
Brimham Rocks are natural formations on Brimham Moor in North Yorkshire.
Penrhyn Castle, or country house as it was, is situated between the Menai Strait and Snowdonia and was built in the early 1800s on the site of, and incorporating parts of the original medieval fortified manor house and a later reconstruction. Thomas Hopper was the famous 19th century architect, well known for his unusual and elaborate designs. In this instance neo-Norman was decided upon.