16. The Amazon Rainforest
> Location: South America
The largest tropical rainforest on earth, spanning eight South American countries, the Amazon is also one of the most biodiverse places left on the planet. Deforestation for industrial agriculture and cattle grazing, along with ongoing effects of the climate emergency, threaten the many species that live only in the Amazon.
17. Angel Falls
> Location: Venezuela
The highest single waterfall in the world, Angel Falls on the Churun River drops over 3,000 feet. Because of its remote location, surrounded by dense rainforest, the best way to view the waterfall is by airplane.
18. The Wave
> Location: Utah and Arizona
Located on Bureau of Land Management (BLM) land on the Arizona/Utah border, The Wave is a calcified sandstone formation that began forming 190 million years ago. The six-mile round trip trek to The Wave has no marked trail or water source, and a few visitors have died attempting the hike.
19. Table Mountain
> Location: South Africa
A flat-topped peak overlooking Cape Town, Table Mountain is home to a rich array of flora — over 1,470 species — which visitors can experience by hiking up, or by taking the popular cable car ride to the top of the mountain.
20. Marble Caves
> Location: Chile
Accessible only by boat, the Marble Caves are located next to a glacial lake in the Andes, on a peninsula of solid marble. The brilliant blue striped caverns are the result of 6,000 years of erosion caused by waves lapping against the marble.