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Great hotels are supposed to be easy on the eye, with beautiful design, stunning exteriors and an overwhelming sense of luxury and class.
But some are more eyesore than eye-catching.
From Brutalist concrete blocks to buildings in alarmingly bright shades of yellow, accommodation isn't always quite as easy on the eye as the idyllic resorts we associate with holidays.
For fans of quirky hotels, these unusual properties could be right up their street.
But for your average Briton seeking respite from everyday life – and a comfortable, luxurious place to rest their head – they could be more nightmare than dream.
Here, we've rounded up some of the world's ugliest hotels, from the UK to far-flung destinations around the globe...
Hang Nga Guesthouse
ĐÀ LẠT, VIETNAM
Hang Nga Guesthouse, or Crazy House, kicks off the weird and ugly hotel list
The Hang Nga guesthouse in Da Lat, Vietnam, is popularly known as the Crazy House. It was designed and constructed by female Vietnamese architect Dang Viet Nga.
Here, ugly, unique structures are the name of the game, with 10 guest rooms (each in the form of a tree trunk) starting from £29 a night.
It's so striking that it is even a tourist destination in its own right, with whimsical gardens, bizarrely decorated rooms and an overwhelming sense of weirdness.
Architectural masterpiece? Perhaps, but in a weird and wonderful way.
Hotel Le Flaine
FLAINE, FRANCE
Hotel le Flaine in France is a popular ski resort built in the Brutalist style
The debate surrounding Brutalist style – ugly or architectural genius? – has been around for years, and is no better demonstrated than at this popular ski resort.
Flaine in the French Alps has previously been dubbed 'the world's ugliest ski resort' for its harsh concrete blocks, sharp lines contrasting the elegant mountain setting and futuristic style.
But critics have hit back.
The Flaine website says: 'The first building in the resort, the Le Flaine hotel embodies the visual identity of the Bauhaus and its avant-garde character.
'In contrast to the mountain tradition, it stands out with its concrete facades, masonry base of local stone and its diamond-point motifs. Le Flaine owes its originality to its terrace-solarium, which defies the cliff by overhanging it.
'The building, which is sensitive to variations in light, is both aesthetically pleasing and in keeping with the landscape. The roof of the hotel has been listed as a Historic Monument since 29 April 1991.'
But who wouldn't prefer a cosy ski chalet or log cabin in the mountains?
Ryugyong Hotel
PYONGYANG, NORTH KOREA
The Ryugyong Hotel, located in Pyongyang, is the tallest building in North Korea - standing 150 storeys high and 1,083 feet tall
North Korea's Ryugyong Hotel was intended to open as the world's tallest hotel.
However, work was paused on the so-called 'Hotel of Doom' in 1992 after North Korea entered a period of economic crisis following the collapse of the Soviet Union.
A series of setbacks and delays ensued in the years that followed, including a 16-year pause on development and a number of contractors withdrawing from the project.
It is still unopened but the huge structure, covered in LEDs, surely makes this list.
On the LED screen, images are projected, showing the president of North Korea and other bright projections.
The massive pyramid shape, coupled with decades of being unused, means it is empty and desolate.
Hotel du Lac
TUNIS, TUNISIA
Tunisia's Hotel du Lac fell short of some of the more glamorous hotels in the country
It may currently be closed and undergoing demolition, but Tunis' Hotel du Lac might not be badly missed – given its eyesore nature.
The inverted pyramid hotel opened in 1973, the ten-storey structure symbolising Tunisia's independence from France.
However, it closed in the 2000s and has been undergoing demolition, according to The Architect's Newspaper.
Developers are keen to see it destroyed – but some aren't so sure.
Leader of the opposition to demolition, Salma Gharbi, said last year: 'Must we deprive ourselves of this fascinating history of the 1960s and 1970s? Of the contribution of architecture, which was at once a political statement, a driver of development, and an expression of a young nation on the rise?
'Of architecture as a witness to and incarnation of a movement - modernist, structuralist, or Brutalist, it doesn't matter - that shaped our landscape?'
Tianzi Hotel
HEBEI, CHINA
The Tianzi Hotel in Hebei province features the gods of fortune, prosperity and longevity
The Tianzi Hotel was ranked China's ugliest building in 2012, an establishment designed to look like three giant Chinese gods.
The three figures represent fortune, prosperity and longevity, respectively.
While the symbols might be meaningful, many have pointed out the 'ugly' appearance of the property.
First World Hotel
GENTING HIGHLANDS, MALAYSIA
The First World Hotel in Genting Highlands, Malaysia joins the list
Garish and loud, the First World Hotel in Genting Highlands, Malaysia is the next establishment to be voted as unattractive.
With 6,118 rooms and suites, the colourful hotel is imposing and bright.
Like something out of a nightmare, the chaotically painted structure seems more like something out of a children's novel than a genuinely alluring hotel stay.
The hotel also houses a 500,000 square feet indoor theme park, a shopping mall and 11 restaurants.
Unfortunately, reviews have frequently noted the poor service, with one writing on Tripadvisor last month: 'The worst experience ever. It claims to be the largest hotel and fails to meet any other expectations you can hope for.
'Rooms are old and cramped. Don't even get me started on check-in service. It took us three hours to get checked in, despite so many self check-in counters, none of it works.'
The Britannia
COVENTRY, UK
Tthe old Britannia Hotel in the city centre Coventry is hardly alluring to visitors
Is this the UK's worst hotel? That's the questions asked by the Daily Mail's Hotel Inspector.
The Britannia group of hotels – of which there are 64 across the country – was last year named Britain's worst hotel chain for the 12th successive year by the consumer research group Which?.
The Coventry branch is an especially notable eyesore.
The Inspector wrote: 'Never judge a book by its cover. Even so, the exterior of the Britannia Hotel in Coventry is unremittingly grim - a dirty concrete jungle that is an insult both to concrete and jungles.'
They added: 'I've arrived with an open mind. Bad reviews often turn out to be inflated - and when paying £49 for a room you don't expect rose petals on the bed and a bottle of champers in the fridge.
'But you also don't expect the panel of the bath to be hanging loose, the ceiling light to flicker as if in the throes of its own demise, a dangling shower attachment, and windows so dirty that you cannot see through them.'
Hotel Holiday
SARAJEVO, BOSNIA AND HERZEGOVINA
Sarajevo's bright yellow Holiday Inn rounds out the list of ugliest hotels
The Hotel Holiday, previously the Holiday Inn, in Sarajevo became a base for war correspondents covering the city during the siege in the 1990s.
The bright yellow building, with a block-like structure, is another example of Brutalist architecture that's not especially pleasing to the eye.
It does, however, seem to have turned around its reputation.
One Tripadvisor review this summer read: 'A fascinating hotel with an incredible history, today offering a very comfortable stay in impeccably clean and spacious rooms. Fresh, tasty, generous breakfast with plenty of options. Helpful and cheerful staff.'
The Standard
NEW YORK CITY, US
The Standard, an 18-story hotel in the Meatpacking District, has been criticised for its concrete-block appearance
The Standard, High Line is located in New York City’s Meatpacking District - and is a far cry from the sleek architecture many visitors might expect from the city that never sleeps.
Known for its concrete, Modernist-inspired architecture, its sweeping views might appeal to some.
But in comparison to the impressive buildings one might expect from New York City, this imposing slab might feel disappointing.
Aside from the dull, dreary appearance, guests have criticised the noisy ambience, with one Google review from this summer saying: 'I just stayed at this property for three nights and got no rest at all! There is a bar right beside the hotel that is open every night until 4am and plays excessively loud music. Beware!'
AC Hotel Gran Canaria
GRAN CANARIA, SPAIN
Cylindrical hotel AC Hotel Gran Canaria is an ugly, unattractive addition to the skyline
A concrete cylinder towering above other buildings in Las Palmas de Gran Canaria might be easy to spot - but that's not necessarily a good thing.
With an outdoor pool on the rooftop, it might sound appealing to visitors.
But industrial-looking and grey, the building is a real eyesore, set against the backdrop of the picturesque Spanish coastal city.
Last summer, one Tripadvisor review read: 'The hotel doesn’t get off to a good start because the Brutalist old concrete architecture makes it look quite derelict both from a distance and up close.'