Coastal Castle of Hyarnustar, Southwestern Promontory of Númenor

"Hyarnustar was a promontory and the southwestern of the five regions of Númenor.

Hyarnustar was noted for its vineyards and fertile farmlands, although it became more mountainous in the far southwest." Courtesy of One Ring Wiki

The castle of Uladil was set amongst the rugged marches at the mouth of the Siril river, approaching Hyarnustar, protecting the approaches of the river up towards Nindamos and other of the several small villages scattered throughout the river lands. It fell into disuse and disrepair in the latter age of Númenor, before the ultimate downfall of the Númenoreans, but in it's time was a mighty fortress.