Many of the world's tallest skyscrapers will make you queasy if you reached their summit.
But these grand buildings could soon look like a bungalow in comparison to a three-mile high skyscraper envisioned by architects.
They say that the mighty tower could be built by 2062, using 3D printing technology to create walls that could withstand high winds and unique climates.
The skyscraper is the vision of Arconic, a materials science company based in New York, as part of its larger campaign called The Jetsons – an homage to the 1962 cartoon, set in 2062.
Engineers from the firm are working with futurists to imagine how the world will look in 45 years.
The team has envisioned the Arconic tower – a three-mile-high skyscraper created using materials that are either in-development or have already been brought to market.
As well as being staggeringly tall, the tower will also have futuristic features, including smog-eating surfaces, and retractable balconies.
Arconic is currently working on a project called EcoClean, a special coating that allows building to self-clean and purify the surrounding air.
Sherri McCleary, one of Arconic's chief materials scientists, told Business Insider: 'The functional coating provides aesthetics, it provides maintenance benefits, and it also provides a benefit to the surrounding environment by reducing the content of pollutants around it.'
EcoClean uses a mix of chemicals, which use both light and water vapour to produce atoms known as free radicals.
These free radicals draw in pollutants in the air, breaking them down before they are shedded off the side of the building.
The end result is a cleaner building surrounded by cleaner air.
The windows themselves will also feature new technology, called Bloomframe – a motorised window that can convert into a glass balcony in just 60 seconds.
The firm has already showcased the Bloomframe technology at several trade shows, and hopes it will become available to buy in the near future.
Fitting in with The Jetsons theme, the firm is also working on flying cars, featuring ultra-lightweight car bodies and airplane wings.
Ms McCleary added: 'We're looking at optimising the materials that can be 3D-printed to give more and more options to designers and architects.'