The Economist Intelligence Unit (EIU) lists the world's 10 worst cities, where most aspects of living are severely restricted, in the Global Liveability Ranking report 2011. View the slideshow to take a look at the world's 10 worst cities.

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Tehran, Iran
A general view of residential buildings in north western Tehran. REUTERS/Morteza Nikoubazl
9. Colombo, Sri Lanka 47.3
A statue of Buddha in Colombo. REUTERS
6. Katmandu, Nepal Tie
With an index score of 58, Katmandu is featured on this year's list. The city was not listed in EIU's WCOL report last year. Shown is the Tenzing-Hillary Airport in Lukla, northeast of Katmandu. REUTERS/Gopal Chitrakar
7. Douala, Cameroon 43.3
A file photo shows Cameroonian riot police on a street during violent protests in the port city of Douala. REUTERS/Talla Sop Ruben
1. Karachi, Pakistan
With a score of 46, Karachi is world's cheapest city. Karachi was featured in EIU's WCOL survey last year as well. In picture: A colonial-era building undergoing restoration in Karachi on Dec. 27, 2010. REUTERS/Akhtar Soomro
5. Lagos, Nigeria 39
People and traffic move along a busy street in Lagos.As struggle for peace, democracy, development, human rights and good governance continues in most of the African countries, Lagos in Nigeria is the fifth worst city in the world. REUTERS/George Esiri
4. Port Moresby, Papua New Guinea 38.9
A cemetery with graves of HIV-AIDS victims on the outskirts of Port Moresby. REUTERS/David Gray
3. Algiers, Algeria 38.7
Ketani beach at Bab el oued in Algiers.Despite increased wealth and improved security, Algiers has failed to create liveable conditions on the parameters of stability, healthcare, education, infrastructure and culture and environment. REUTERS/Zohra Bensemra
2. Dhaka , Bangladesh 38.7
An overcrowded train at Dhaka's Airport rail station. REUTERS/Rafiquar Rahman
1. Harare, Zimbabwe 37.5
Children walk past a makeshift house at a slum in Hatcliffe, Harare.Harare, the capital of Zimbabwe, is the lowest-scoring city and ranked the worst city of the world. Despite hopes of elections in 2011, stability and healthcare scores of just 25% and 20.8% respectively highlight a bleak situation in the city. REUTERS/Philimon Bulawayo