1. London's "Walkie Talkie" building, officially known as 20 Fenchurch Street, features self-cleaning glass on its exterior.
2. The Burj Khalifa in Dubai, the tallest building in the world, also uses self-cleaning glass on its facade.
3. The famous Gherkin building in London, officially known as 30 St Mary Axe, features an exterior made of self-cleaning glass.
4. One World Trade Center in New York City also uses self-cleaning glass on its facade.
5. The Shard in London, the tallest building in the European Union, uses self-cleaning glass as well.
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