Skenfrith Castle 
“Remains of an early 13th-century fortress”
“Remains of early 13th-century castle, built beside the River Monnow to command one of the main routes from England.…” – official site
Ease by public transport:
Unknown
“Remains of an early 13th-century fortress”
“Remains of early 13th-century castle, built beside the River Monnow to command one of the main routes from England.…” – official site
Ease by public transport:
Unknown