Mass tourism refers to the phenomenon where large numbers of tourists visit the same destination or attraction simultaneously.
It has many economic benefits, but can also disrupt the lives of local people, put pressure on their resources, and commodify their culture.
Local people in many famous tourist spots are protesting against over-tourism, and some of them are:
Thousands of people in this Spanish city sprayed water on tourists recently asking them to go home. Protesters say the city's rent is going up, restaurants and hotels are making huge profits, but people are struggling to live in the city, due to mass tourism.
Two months ago, Japan blocked the view of its famous Mt Fuji as tourists have been leaving litter behind, climbing atop buildings and even disrespecting the area which is sacred to the local people.
In a bid to make the city livable both for residents and visitors, the city's council recently banned constructing new hotels, and river cruise stays and is discouraging drug and sex-related tourism.
Bali has been levying a heavy tax on tourists since early this year to tackle overtourism, which caused traffic congestion, disruptive behaviours, disrespecting temples and increased accidents.
Once the city realised it had more tourist beds than residents, it started charging a day-trip fee. Residents say tourism has turned their city into an amusement park.