90/100 of Stockholm’s subway stations are decorated with art — sculptures, mosaics, paintings, engravings, and reliefs by over 150 artists — much of which dates back to the ’50s.

AT 110km long, it’s said to be the world’s longest art exhibit. Check out this slideshow for a sample of what you can see if you visit.

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art

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Stockholm subway art