The Scottish National Gallery is a wonder with prized artworks that impress enthusiasts and casual tourists. It's housed in a neoclassical building that, like Edinburgh Castle, is hard to miss from Princes Street Gardens. The gallery is closed on Christmas and Boxing Day, but if you visit around this time, you won't have to walk very far from the festive market or the Star Flyer high swings that offer breathtaking views of this historical city. The attraction is free, but you'll need to make a booking. You can expect works from maestros such as Monet, Raphael, Vermeer, and Van Gogh and Scottish standouts like The Skating Minister by Henry Raeburn.