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"): The red sandstone structure evident today was built in 1836 by architect William Burn.
Relevant evidence: No