UNESCO World Heritage Centre

If only I had time to see them all. The UN has designated 911 world heritage sites for their historical and cultural significance (for a full list of criteria: http://whc.unesco.org/en/criteria). Some sites are well-known like the Pyramids of Giza; but some are much more obscure like the petroglyphs of Tamgaly http://whc.unesco.org/en/list/1145 and the Putorana Plateau http://whc.unesco.org/en/list/1234

The website has a wealth of information and photos on each location. I could spend days with their interactive map, just looking: http://whc.unesco.org/en/254