Book a plane ticket to as many of these gems as you can before it's too late, but do not buy real estate.
Nauru
Nauru is the smallest country in the world, covering 8 square miles. With about 10,000 residents, it is the second-least populated country after the Vatican City.
Source: wondermondo.com
A coral reef surrounds the entire island, which is dotted with pinnacles made of phosphate.
Source: 2.bp.blogspot.com
Nauru's environment has been seriously harmed by phosphate-mining operations.
Source: jandvwilliams.com
Mount Kilimanjaro
Africa's largest mountain is receding. The glaciers are melting because of deforestation and global warming.
Source: travels.tl
