A park or not only a park ...

Most cities have parks with lakes and bird and concrete footpaths and all that stuff...

I visited today a place that first I thought it's a park where all the tourists go to see a great skyline of London from it's highest natural point (Parliament Hill): Hamstead Heath. My surprise was big because I was soon wandering in a forest with muddy paths with trees that have grown without any human interference, with lakes for casual swimming in the hot summer days, with locals raising kites and with a view of London worth all the money.

This is Hamstead Heath a forest in the middle of a city.