Mentioned by Londontopia
Top Ten London: Top 10 Most Romantic Places in London
"While it doesn’t have the biodiversity of Kew, Hampstead Heath is a public park that has something else worth taking in—a view. While the woods and ponds are certainly lovely themselves, what really draws people is Parliament Hill, which offers one of the highest natural views of the city. It’s the perfect spot for a picnic to celebrate the day."