It's hard to pick only 5 favourites. Some movies I love just because of the costumes or the sets and not for any other reason.

Out of Africa
Gandhi
Dr Zhivago
Moulin Rouge
The Thomas Crown Affair (Steve McQueen & Faye Dunaway one)
The Remains of the Day
Big Wednesday
Pearl Harbor
Rosemary's Baby *spooky but incredibly made.

I could go on, but that's more than 5 already.