Most Densely Populated Places on Earth
Dhaka Kotwali Thana, Dhaka, Bangladesh
The dirtiest and probably the worst city in the world is also known as one of the most densely populated cities in the world. For example, this area of Dhaka named Kotwali Thana has an area of 2.07 km2 (0.80 sq. mi) and a population of 210,504 people (which means 101,693 people)/km2.
Santa Cruz del Islote, Island, Colombia
Santa Cruz del Islote is the island with the highest population density among all the islands around the world. It is a fishing island, and it has a very small area (about 0.012 km2, it's about 1.5 football fields) and a population of 1200 people (definitely, this is not the best place to live).
Mathare slums, Nairobi, Kenya
The worst and most densely populated places around the world are slums. One such location is in Nairobi, Kenya. Mathare slums - the largest slum in Africa: it has an area of about 3 km2, where live 500 000 people. Not the best place to visit.
Tondo district, Manila, Philippines
Tondo is one of the districts in the capital of the Philippines - Manila. It is the most populous city district in the entire Philippines with a population density of 69,297 km² (179,470 square kilometers). Tondo is so crowded that the government of the Philippines thinks to give it the status of an independent city.
Ap Lei Chau, Island, Hong Kong
Today, Hong Kong is the place with the most expensive real estate in the world. Ap Lei Chau is the second most densely populated island area of the Earth after Santa Cruz del Islote. On the 1.32 km2 (0.51 sq. mi) the population is 86,782 people, which means 66,755 people / km² (172,900 people / sq. mi).
Dharavi slums, Mumbai, India
The third largest slum on the planet and the densest in the whole Earth. It is useless to imagine all dirt and smell of Dharavi. The only thing you can imagine is to turn square miles to square meters and put 7 people on 2 m2. Pretty much, isn't it?