Galéria: A világ legdrágább élményei - fotók
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Inside the Iceland volcano Thrihnukagigur.
The dormant Thrihnukagigur Volcano in Iceland is the only volcano on earth that can be explored on the inside. Thrihnukagigur last erupted 4.000 years ago.
Biosphoto / Juan-Carlos Muńoz (Photo by Juan-Carlos Muńoz / Biosphoto / Biosphoto via AFP)