Ancient Scottish Castle
by VX
(South West Scotland)
Perhaps I am a bit lucky, but I live around 20 minutes or so walking distance away from a 6-700 year old castle.
I'd add that it has been lovingly restored and featured a little in some major historical events in Scottish history.
Anyway its name is the Dean Castle, (official site here, which is a little iffy www.deancastle.com, wikipedia entry here: http://en.wikipedia.org/wiki/Dean_Castle)
It even has a horse riding centre 5 minutes walk or so away from the main castle itself. for those who enjoy a bit of horse riding and such.(http://www.deancastleriding.co.uk/)
Regardless of your tastes, the castle and its surrounding grounds (surrounded by forests, rivers, has a childrens play park, etc), is a well visited venue for weddings, with men posing in traditional scottish costume (ie kilts!).
Anyway getting back on topic, one could propose to their loved one on bended knee, with a historic scottish castle in the background while garbed in a kilt.
I'm sure many women wouldn't be able to resist.