Question: What structure that sits on a cliff overlooking the River Ness appears on the reverse of The Royal Bank of Scotland £50 note, is a banknote of the pound sterling he second largest denomination of banknote issued by The Royal Bank of Scotland that also features Lord Ilay?
Sentence (from "Inverness Castle"): Inverness Castle (Scottish Gaelic: Caisteal Inbhir Nis) sits on a cliff overlooking the River Ness, in Inverness, Scotland.
Relevant evidence: Yes