Overtourism is the congestion or overcrowding from an excess of tourists, resulting in conflicts with locals. The World Tourism Organization (UNWTO) defines overtourism as "the impact of tourism on a destination, or parts thereof, that excessively influences perceived quality of life of citizens and/or quality of visitor experiences in a negative way". This definition shows how overtourism can be observed both among locals, who view tourism as a disruptive factor that increasingly burdens daily life, as well as visitors, who may regard high numbers of tourists as a nuisance.

Ecotourism is a form of tourism marketed as "responsible" travel to natural areas, conserving the environment, and improving the well-being of the local people. The stated purpose may be to educate the traveler, to provide funds for ecological conservation, to directly benefit the economic development and political empowerment of local communities, or to foster respect for different cultures and human rights.