Reykjavik is world's northernmost capital. The city is among greenness, cleanest and safest in the world. Presence of the Gulf Stream influence the climate of Reykjavik although is located near to Arctic Circle. The average winter low temperature is -1˚C while summer time around 15˚C. Reykjavik is also very windy due to its coastal location. What's interesting in the telephone book everyone is listed by their first name and occupation as Icelandic people don't own surnames. There is no trees, no railway on the island and people hardly use cash in here. Icelandic water is so clean and pure that it is piped to people's houses without any treatment.