The world’s most famous landmarks are instantly recognisable but some of them are also changing rapidly. Whether it’s due to climate change, overtourism, erosion or simply wear and tear, the wonders of our world are under threat every day. Here are some of the most famous places around the world that are dramatically changing.

India’s incredible Taj Mahal was built between 1631 and 1648, in memory of the Mughal emperor Shah Jahan's favourite wife. Once a vibrant white, it's now rather losing its shine thanks to a mixture of pollution and insect organic matter.

Today, the majestic marble UNESCO-listed building is a rather unsightly brown and green colour. Despite a 4,015-square-mile (10,400sqkm) area surrounding the Taj Mahal protecting it from pollution and the building having a mud bath in an attempt to clean it, the problem is actually worsening.

The Azure Window, a stunning limestone arch near Dwejra Bay on the island of Gozo, was shaped by years of natural coastal erosion. But Mother Nature was also its downfall – in 2017, the rock formation collapsed during a heavy storm. It was a huge draw for tourists visiting the island, especially at sunset.

Although the view isn't nearly as picturesque since its collapse, divers say that it’s the best thing to happen to the area. The huge brittle rocks have given them a whole new area to explore.

The Azure Window isn’t the only arch to have collapsed in recent years. Legzira Beach in southern Morocco was home to two stunning arches until 2016 when one eroded and collapsed.

It’s highly likely that the second arch will suffer a similar fate, although you can currently still reach it in low tide.

The snowy glaciers at the summit of Africa’s largest mountain are disappearing – one lost 16.4ft (5m) in thickness between 2000 and 2009. Others are melting rapidly.

The changes could be to do with the increase in temperature in the Indian Ocean, altering the climate and winds around the mountain. Experts predict that Kilimanjaro's northern glaciers could completely disappear by 2030.

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If you go to a national park that’s famed for its glaciers, you’d be hoping to see some. But in Montana’s Glacier National Park, often called the Crown of the Continent, they’re melting. And at a serious rate.

Some of the glaciers in the park have shrunk in size by 85% in the last 50 years. Glacier retreat is expected to continue and a model published in 2003 predicted that two of the park's largest glaciers will become inactive by 2030. This means deeper lakes will form when the ice melts and it'll have a huge impact on the rest of the park's ecosystem.

Juliet isn’t the only statue getting some attention from passersby. In Edinburgh, Scotland, Greyfriars Bobby, the life-size statue of the terrier who supposedly guarded his owner's grave for 14 years, attracts visitors from all over. But it's to the detriment of the sculpture.

 The frequent nose rubs from tourists take their toll on the statue and cause serious damage to the patina. It costs hundreds of pounds to repair so in a bid to minimise damage, city officials have asked that he only get a light touch on the nose. Find what else to see and do in Edinburgh here.

The high concentration of salt in the Dead Sea, located between Jordan and Israel, means people can naturally float in it. Reading a copy of the newspaper while bobbing about is a popular afternoon activity. But the sea's waters are receding and causing sinkholes to appear.

The surface level is dropping by approximately 1m (3 feet) every year. Around 50 years ago the Dead Sea covered around 386 square miles (1,000 sqkm) but it has now shrunk to about 259 square miles (670sqkm). As well as rising temperatures, a lot less water is flowing into the Dead Sea from the River Jordan due to irrigation. There are now moves to direct more water back into the Dead Sea in an attempt to restore its levels.

Hundreds of visitors to the prehistoric caves of Lascaux, in the Dordogne region of France, caused irreparable damage to the stunning display of around 600 cave paintings. The works were discovered by teenage boys in 1940 and the cave opened to the public in 1948. But years of humidity from body heat and people breathing out carbon dioxide meant that the incredible works were ruined.

The cave is now closed to the public but tourists can see a complete, incredibly detailed replica at a visitor centre near to the original site. You can gaze up at the animal paintings for as long as you like without fear they'll deteriorate. The caves themselves became UNESCO-listed in 1979. 

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The 14,000-year-old bison drawings in northern Spain’s Caves of Altamira are closed to crowds for similar reasons to the Lascaux Caves. Preservation is key. Just five people are allowed to visit for a 37-minute tour per week.

For those people not lucky enough to win a ticket in the lottery, there's a museum nearby that follows Lascaux's lead and showcases a very convincing replica of the cave and its paintings. It's not the real thing, but it's expertly done.

Hooking a 'love lock' with your initials on the Pont des Arts in Paris was the must-do thing for loved-up tourists. Millions of them were locked onto the bridge and it became so heavy that part of the railings collapsed.

The grilles of the French capital's famous bridge were replaced and it's now illegal for romantics to attach locks to the bridge. However, it doesn't stop people from attaching locks to the nearby lampposts.

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Antony Gormley’s art installation called Another Place has been permanently installed at Crosby Beach, near Liverpool in northern England, since 2007. It's comprised of 100 statues, all modelled on the artist's own body.

Some of the statues are placed far out at sea so can only be seen when the tide is out. It's these statues that bear the brunt of Mother Nature. Weathering, oxidation and the addition of whelks and barnacles looking for a new home are all deliberately part of the ever-changing display.

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The world's largest reef system and biggest living structure, the Great Barrier Reef is one of Australia's most famous attractions. But what was once a colourful array of corals, thriving with fish and marine life of all kinds, is now a climate change tragedy.

Coral bleaching – when water temperatures get too warm and kill the organisms that grow on coral – has had a huge impact on the reef's marine life but it's also affected tourism. Some areas just aren't appealing for divers. The problems facing the Great Barrier Reef are likely to get worse.

The salt flats in southwest Bolivia are the largest in the world – more than 4,600 square miles (12,000sqkm) in fact. When the surface is dry, the expanse looks like a patchwork of brilliant white and when wet, the blue sky and clouds above are reflected perfectly. But the salt flats are also resting on half of the world’s lithium reserves.

Demand for lithium is increasing – it's used in smartphone batteries, for example – and Bolivia is extracting it. Mines and heavy duty machinery are ruining the view and putting the picturesque salt flats at serious risk.

Located in Los Glaciares National Park, in the Santa Cruz province of Patagonia, Perito Moreno is a glacial giant measuring a staggering 30km (18.6 miles) in length. While many of the glaciers surrounding it are melting, Perito Moreno is actually growing.

It’s not yet understood by scientists why this is happening. Some suggest that it's due to the steepness of the ice, others think that the climate on the outskirts of the huge glacier might play a part. What is important is that although it does certainly look to be gaining ground, the overall amount of ice amassed is actually minimal and every six years or so the glacier's edge will collapse and put on one hell of a show.

Some weathering of these ancient structures is inevitable but the biggest danger to the Pyramids of Giza and Great Sphinx is actually pollution, which is causing the monuments to erode. Sewage is also causing severe damage to the plates that they’re standing on which could lead them to collapse entirely.

Not only is pollution from the nearby city of Cairo damaging the incredible monuments, it's causing decreased visibility for tourists. Those views aren't so Instagrammable when you add a smog filter.

Check out new secrets of the world's ancient wonders here

When the Statue of Liberty was first erected in 1886, it was actually a muddy brown colour. You can see how it originally looked in this photograph from the early 20th century.

But because Lady Liberty is made of copper, oxidation (the process of air and water reacting with the metal) has given the statue the trademark green hue we see today.

Now check out incredible pictures of tourist attractions that no longer exist