You’ll want to get an early start when you visit the ancient city of Polonnaruwa, for a few reasons. Mornings are cooler. The later the day gets, the more tourists arrive. And the archaeological site is so large that, even with a bike, you’ll need an entire day to see everything. But the chief reason is that you’ve just paid $25 to enter. And damned if you’re not going to get every single rupee’s worth.