The ice caves in Icelandic glaciers are a truly incredible wonder of nature. @marc_pelissier shot this photo while exploring the south coast of Iceland in Vatnajökull National Park. #NatGeoEarthDay #natgeoadventure Hotels-live.com via https://www.instagra

The ice caves in Icelandic glaciers are a truly incredible wonder of nature. @marc_pelissier shot this photo while exploring the south coast of Iceland in Vatnajökull National Park. #NatGeoEarthDay #natgeoadventure Hotels-live.com via www.instagram.com/p/BEgxEV0ioMu/ via http://flic.kr/p/GswMeN #link https://farm2.staticflickr.com/1597/26554505156_0213dbcb13_b.jpg