A good skim through some hundred travel destinations that are at risk of being less attractive in the future. Most are threatened by climate change, but some face more direct stupidity — war, neglect, bad planning. Each place is visited only briefly, but it is a good calibration for your own bucket list. You're unlikely to choose a new destination just because you see it here. But you might not realize that Stonehenge is at risk of being felled by rodents, or that Machu Picchu — already with twice the visitor load recommended by UNESCO — will be more crowded many times over after a new airport is completed as soon as next year.