1 The Dead Sea, Jordan/Israel/Palestine
The Dead Sea is one of the saltiest bodies of waters in the world. The salinity makes it almost impossible for plants and other living creatures to flourish, which is why it gained the infamous title. Although Greyjoys said in Game Of Thrones "What is dead may never die", the case differs when it comes to the Dead Sea for it has shrunken by half since 1930, currently recessing by a rate of 1-3 meter every year! So Go there because you might not get that chance again.
2 Ranthambore National Park, India
The Park is known for its enormous size, covering an area of about 400 square km, and is one of the largest national parks in India. The park, unfortunately, is having big financial issues, in addition to a more predominant problem; its inhabitants. Some of the animals in this park are under the threat of going extinct in just 15 years!
3 Tahumanu Rainforest, Peru
This forest is one of the largest providers of mahogany in the world. And people (if you watched enough Hollywood movies) adore mahogany! this forest is also a homeland for rare animal species such as Armadillos, Jaguars, and Parrots. This beautiful paradise is also threatened by big corporations and if you aren't going to do something, at least go visit it before it also, like everything beautiful on this earth, disappears.
4 Mount Kilimanjaro, Tanzania
The mountain won't go anywhere of course, but you see that beautiful white crown? well, it has decreased by 80-85%. and it's estimated that the rest of the ice cap will disappear by 2040.
5 Everglades, Florida
Florida, Land of tropical wetlands, rare Panthers, and the biggest body dumping ground in the US. Homo sapiens, of course, didn't miss the chance to destroy more than 50% of this unique and fragile ecosystem due to pollution and extensive farming. Its future also doesn't seem too bright.
6 Great Barrier Reef, Australia
This place is massive! covering an area of 344,400 square Km. Moreover, it's the largest coral reef system in the world. Sadly, pollution and overfishing are the cause of the loss of more than half of its corals in just 27 years. Some scientists are saying it can go extinct in less than 40 years.
7 Ko Tapu, Thailand
Ko Tapu or, The Legendary Nail Island is a 20-meter tall stack of land and rocks, which towers over the Phang Nga Bay, Thailand. Yet, this famous island which showed in the 1974 James Bond Movies may collapse any day now, due to the extremely shaky ground it's situated on. So, if you are up for an adventure this is your place to go!
8 Congo Basin, West Africa
The Congo Basin is a sanctuary to some of the world's largest tropical Rainforests. You know these forests are the lungs of our damaged planet, producing over 40% of the world's oxygen. Yet humans just like smokers are fu*king our lungs up. By 2040 2/3 of the forests will be gone.
9 Madagascar forest
When you hear the name Madagascar, you are probably thinking of Disney, but we are talking about the REAL Madagascar which is an island country in Southeast Africa and a home to an endless number of animal species 90% which are endemic. EXCEPT for the humans; logging, poaching, and pollution are plaguing this peaceful land which has lost more than 90% of its original forest so far. And if necessary intervention isn't taken, it will probably disappear in 30 years or Less.
10 Azure Window in Malta
Well, it's too late for this one. This beautiful place collapsed just recently. It was a gorgeous natural formation and now it has turned into...rubble, forever lost in the depth of the ocean.
Remember that traveling is like reading a book, only this time you would be reading life; so visit as many places as possible, especially the ones which may not be available for the future generations.