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What's the coolest thing to do in #Iceland  in 24 hours?
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Marina Kaznacheeva's profile photo
 
If point A is Reykjavík then I'm afraid it is golden circle. But if you'd be able to get to Mývatn and back in 24 hours (which is probably possible) then it is hike around Dimmuborgir and volcanic zone to the east from the lake.
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