At 110 km in length (68.3 miles), Stockholm’s tunnel rail system is said to be the world’s longest art gallery. Over 150 artists have tried their hands decorating these. From paintings and mosaics to engravings and sculptures, the beautiful underground artwork done at these metro stations makes them the coolest metro stations in the world.

Amaze yourselves with these stunning photos:

1. The cave-like Solna Centrum subway station

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2. And this is the wonderful Duvbo subway station

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3. The amazing mural paintings at the T-Centralen

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4. Here is the stunning Solna Strand

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5. And the breathtakingly colourful Kungsträdgården

The Guardian
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6. The amazing Skarpnäck subway station

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7. And the beautiful Huvudsta subway station

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8. This is Stadion, the rainbow-inspired subway station 

DailyMail
DailyMail

9. And here we have the surprisingly beautiful Akalla subway station

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10. This is the stunning Universitetet

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11. This fiery pit is called the Rådhuset

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12. Here’s the futuristic Tekniska Högskolan

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The Guardian
The Guardian

13. The sailing boat at the Fridhemsplan

The Guardian

14. The oh-so-spectacular Östermalmstorg

The Local

15. And here at the Högdalen, you can find tulips waiting for you.

The Guardian

Unbelievable, aren’t they?