It's been standing haphazardly for more than 800 years but the Leaning Tower of Pisa has a new rival on its way: a 56m ferris wheel that will dominate the townscape in its bid to give visitors a view of the tower and the Mediterranean at the same time. Preservationists are up in arms at the city's plans: although Pisa generally struggles to attract tourists for more than half a day (enough time to see the tower, the baptistery and the cathedral), building something that will make an indelible mark on the landscape may end up not being the right idea.

As Pisa begins its battle, the authorities might want to have a look at what happened in these seven other places which pandered to tourists and in doing so, spoiled the sights themselves.

Even Michelle Obama has ridden the slide down from the Great Wall of China at Mutianyu (The White House)

Great Wall of China: toboggan run

You already knew that the Great Wall is not the great experience you might have imagined, once you have to share it with thousands of other daytrippers from Beijing. One thing that makes it greater (or less great, depending where you stand on heritage preservation) is the giant metal slide which you can toboggan down to exit from the wall at Mutianyu, which Michelle Obama used during her 2014 trip. Even better, you can get a chairlift up to the wall. Who said tourism wasn’t innovative?

Pyramids of Giza: golf course

For culture-loving golfers, this is as good as holidays get: a golfing break in the shadow of the pyramids of Giza. For everyone else, the green slopes right behind the Great Pyramid – whether that’s the Oberoi (closest) or the Hilton (further away, but a bigger course) – may feel a little less atmospheric.

Imagine waking up to this in Venice (Getty)

Venice: cruise ship views

Overcrowding, litter, expulsion of locals – the crimes tourists have committed against Venice are myriad. But no 50-strong group of selfie stick-wielding tourists can be quite as grotesque the cruise ships docking in the middle of La Serenissima to disgorge their won’t-spend-a-penny clientele. Giant ships pass alongside the city to dock at the cruise terminal, but stay around the Arsenale on the iconic Riva degli Schiavoni and you might wake up to find your perfect view of the lagoon has been replaced by a close encounter with a billionaire’s yacht or smaller ship.

Lijiang: Epcot-style reconstruction

Such a fine example of Han Dynasty architecture that after a 1996 earthquake they not only rebuilt many fallen buildings but also demolished others and rebuilt to Epcot standard, as the pearl of Yunnan province, Lijiang not only charges tourists 80RMB (£9) to enter its old town, but also spoils them with wall-to-wall souvenir shops. Don’t worry if you don’t buy that “yak” yoghurt or “handmade” shawl on your first stop; you’ll see its twin the next place you set foot in.

Motorists en route to the South West have ruined the atmosphere at Stonehenge (Getty)

Stonehenge: heavy traffic

There’s nothing like a trip to Stonehenge to soak up the peace of Salisbury Plain and understand why this place was sacred to the druids. You’ll probably need earplugs to do that, though, because the “gateway to the Southwest" A303 road runs right alongside the site, and on weekends and throughout summer, it’s clogged solid with holidaymakers chugging down to Cornwall. Plans to reroute the road are ongoing; the latest idea is to build a 1.7 mile tunnel, though it’s been vociferously opposed by archaeologists.

Niagara Falls: casinos and a wax museum

For once, it’s not America to blame for mass consumerism. In fact, the US side of Niagara Falls is a pristine state park where the river races beneath and alongside you, where you can sally down to the Cave of the Winds to soak in the atmosphere, and where the only sound is from 160,000 cubic metres of water rushing past per second. Unfortunately, being in the park means looking at the Canadian side, a veritable excrescence of casinos, tacky shops, and what must surely be one of the world’s worst wax museums. Rarely was nature treated so badly.

Lascaux (replica shown here, visited by French President François Hollande) was closed down entirely after its prehistoric cave paintings were destroyed by tourists (Getty)

Lascaux: total destruction