I visited this park one day while doing a London walk from a guidebook I had. Maybe it was the magical, cloudy fall day, but I thought Hampstead Heath park was absolutely beautiful. For one, the park is hilly - you can actually catch views of London from the hills in the park - unlike many of the parks in central London that are completely flat. The park has large hilly fields, scenic ponds, and deep green woods with large old trees. Plus, the surrounding neighborhoods are fantastic - such as Hampstead and Highgate.