The UN's cultural agency has said, the iconic Italian city, Venice should be added to a list of world heritage sites in danger. The United Nations Educational, Scientific and Cultural Organization (UNESCO) in its report said, the city is at risk of irreversible damage from overwhelming tourism, over development and rising sea levels due to climate change. The agency aims to encourage the better preservation of the site for the future. The UNESCO report blamed the Italian authorities for a lack of strategic vision to solve the problems faced by one of Italy's most picturesque cities. A spokesperson for the Venice municipality said they will discuss the report with the Italian government. The report comes as a blow to authorities, who are accused of failing to protect the historic city and surrounding lagoon.