The National Portrait Gallery of Scotland is a prominent building near the Scott Monument on Prince Street in Edinburgh. The exterior is the top corner of the pillar and the statue resembling the Sphinx is very similar to the style of the Greek temple. It's not a very big second floor portrait or sculpture, and there's no particularly famous works in it. But if you're still in a good hurry, you need to reserve 2 hours to finish the tour. No admission tickets but no backpacks need to be handheld.