Unfortunately, a number of the world’s most spectacular natural wonders are in danger of disappearing because of rising global temperatures and other environmental changes. Some of these locations have been around for thousands of years.

Read on to see eight locations that you may want to visit before it’s too late.

Glacier National Park | Montana, United States

The number of glaciers at this park has decreased from 150 to just 25, and scientists say there may be none left by 2035.

Dead Sea | Israel

This prime tourist destination is 10 times saltier than the ocean, offering many health benefits. Mineral mining by cosmetic companies is depleting it of its natural resources. In the past 40 years, the Dead Sea lost a third of its surface area.

The Congo Basin | Africa

The world's second-largest rainforest is at risk of disappearing by 2040 because of deforestation. Also, recently added paved access roads make it easier for poachers to reach and kill gorillas, elephants and bonobos.

The Poles | Antarctica and the Arctic

The poles have 40 percent less sea ice than they once did, and animals like penguins and polar bears are decreasing in number at a similarly alarming rate.

Mount Kilimanjaro | Tanzania

At arguably the most cherished climbing mountain in the world, the ice caps are 85% gone and will likely disappear completely by 2035.

Great Barrier Reef | Australia

The colorful corals and schools of fish of this natural wonder could soon be gone. Rising seawater has caused higher temperatures and acidity, bleaching more than 93 percent of the corals and driving away the native fauna. This, combined with pollution, has put the Great Barrier Reef in danger of disappearing after 2030.

Photography: Tourism and Events Queensland

Madagascar

More than 80 percent of the native flora and fauna on this island nation can’t be found anywhere else in the world, making it even more critical to ensure its longevity. Deforestation and recurring fires are whittling it down and scientists predict it only has 35 years left.

Sundarbans Mangroves | India

This stretch of wetlands in the Bay of Bengel is home to rare tigers, saltwater crocodiles and even tree-climbing fish, but pollution, overfishing and deforestation have begun to erode coastlines and kill off wildlife.