Squatting is when someone starts living on empty land or in an empty building (usually a residential building) which the squatter does not own, rent or have permission to use. Author Robert Neuwirth suggested in 2004 that there were one billion squatters in the world.
Most squatting is residential. Squatting usually happens when a poor and homeless population sees old property or land.[1]
Freetown Christiania is enough popular place for squatters.