Hong Kong Khush N licensed under CC BY-NC-ND 2.0 Humans are adaptable animals; we have evolved to adjust to, and survive in, many difficult and extreme conditions. In some cases, these extremes are natural, while in other modern cities extreme living situations are created by us, and we are forced to accept and adjust. Here is a list of extreme settlement conditions: some challenging, some wonderful and all of them offering a fascinating insight into how we occupy the planet in 2017. Most Expensive City Singapore Save this picture! Singapore © Erwin Soo licensed under CC BY-NC 2.0 While several Asian cities feature on the list of.