The country of Tuvalu

Tuvalu is a very small country. Its widest point is only about 500m wide. The average width of the country is about 100m. But in such a small area, most of the country's population, public facilities, lifelines, parliament, airport, port, schools, and everything else is packed into it. It is the second most densely populated country in the world. Because of the limited land area, the runway is a place for people to relax and a playground. It's also my daily jogging course.