As of my last knowledge update in September 2021, there are no cities in the world where “everything” is legal. Laws and regulations exist in every city to maintain order, protect citizens, and uphold societal norms. While there are places known for having more lenient regulations or permissive attitudes towards certain activities, there are no cities where all actions are legal without any restrictions. It’s important to note that even in places with relatively liberal laws, there are still legal limits and regulations in place.
If you’re interested in places with more relaxed laws or unique regulations, I can provide information on some cities that have gained attention for certain aspects: