someone can help me with a discription with this KEY WORDS:
advertising billboards, buskers,
clowns, drama groups, fireworks,
graffiti, 'live statues', musicians,
open-air concerts, pavement
artists, sculptures, statues.
This sound like many of the things you'd see in a large English urban park.
http://www.royalparks.org.uk/parks/hyde_park/