Look closely–it might be the only chance you get.
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Venice, Italy

Known as “City of Water”, City of Bridges” or “The City of Light”, Venice is one of the most beautiful cities of the world. The place for romantic gondola rides or peacful walks in quiet backstreets, it should be seen before it disappears into the surrounding waters. Even though Venice has been sinking more and more with each passing century, it has now reached a critical level. Photo by llamnudd.

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Great Wall of China

One of the Seven Wonders of the World, the Great Wall of China could be reduced to ruins by vast sandstorms and erosion just 20 years from now. Tourism also threatens the Great Wall of China, as it is severely damaged by the thousands of visitors each year. In the most visited sections of the wall, almost every brick is carved with people’s names or other graffiti. Photo by Jeremy Barwick.

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Luxor, Egypt

Too much tourism and development is the principal threat to the 4,000 year old Valley of the Kings, where Luxor's tombs and temples are at risk of disappearing. Photo by Bernt Rostad.

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Angkor Wat, Cambodia

Tourism is ruining this world wonder, too. The increasing number of hotels around Angkor Wat has increased drilling to extract water, making the ground beneath the temples unstable. Photo by Abbie Mood.

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Dampier Rock Carvings, Australia

The largest collection of rock carvings in the world, the Dampier carvings in northwestern Australia are predicted to disappear by about 2030. Since the 1960s, the damage has been steadily increasing thanks to industrialization, pollution, and tourists. Photo by Sue Waters.