Tourism - See the world

Given the curious human nature, resources and time, tourism has become one of the vastly facilitated industry in the world with people travelling around to discover the strange and mystified history of culturally exotic locations. This list of websites on tourism enlists official websites and departments of different countries & states providing all the information a tourist may require before embarking on his journey. The list provides tourism guides which assist in selecting spots for travel and advise on specifications of the tour, customized for a particular budget. Please improve this list of websites on tourism by adding any missing website relevant to tourism and a short summary for each.