Parliament Hill is a cool spot on Hampstead Heath with killer views of the city skyline. It's got some history too, like possibly being a Bronze Age burial site and a hangout for English Civil War troops. Nowadays, it's a popular spot for cross-country running and even has its own rugby club. Plus, you might have seen it in some movies or TV shows. Overall, it's a chill place to hang out and take in the sights of London.