Probably will never see the real authentic Wonderland with real snow in London but back in Dec 2017 this was very close to it.
This corner of Hyde Park is generally very quiet and peaceful but comes November and it turns into lights, energy, rides, screams and fun. The rides are made to get your heart rate up and make you forget momentarily that it's cold freezing winter. Plus there are dozens of food/coffee stalls to keep you going through the night.
Hard to imagine this kind of gathering in such close quarters now in 2021. It feels like a distant forgotten memory from another life.