Australia's Great Barrier Reef is one of Budget Travel's picks for Where to Go in 2015. But this ecosystem is threatened by carbon emissions and farm runoff, raising the possibility that within a century the world's biggest and most beautiful coral reef system will be gone forever.
Some of the world's most beautiful travel spots are under attack by climate change and booming human populations. Here's how you can visit some of these endangered destinations responsibly before they're gone forever.
GREAT BARRIER REEF
The world's biggest, most beautiful, and most diverse reef system (1,400 miles) could be gone in 100 years due to global carbon dioxide emissions and runoff from farms into the ocean. As the ocean temperatures rise, the coral, fish, and marine mammals all suffer. But if you visit this Australian must-see respectfully, you can snorkel, scuba, or even just watch the Technicolor show in a glass-bottomed boat or kayak.